Latest Articles from PhytoKeys Latest 100 Articles from PhytoKeys https://phytokeys.pensoft.net/ Thu, 28 Mar 2024 12:51:57 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Two new diatom species of the genus Gomphonemopsis (Bacillariophyceae) from the coast of China and two new combinations for the genus https://phytokeys.pensoft.net/article/114018/ PhytoKeys 239: 255-266

DOI: 10.3897/phytokeys.239.114018

Authors: Lang Li, Qun-Zhuan Nong, Chang-Ping Chen, Yu-Hang Li, Jun-Xiang Lai

Abstract: Two new diatom species belonging to the genus Gomphonemopsis are described, Gomphonemopsis nana sp. nov. and Gomphonemopsis gaoi sp. nov. These two species were compared in detail with congeners. Gomphonemopsis nana is distinguished by its high stria density and small size. This species was found so far to be epiphytic only on the eelgrass collected from Qingdao Bay (Yellow Sea). Gomphonemopsis gaoi is characterized by its isopolar valves, simple proximal raphe endings and acutely rounded apices. This taxon was separated from the exoskeleton of marine copepods sampled from the Futian Mangrove Nature Reserve (South China Sea). In addition, two new combinations, Gomphonemopsis oahuensis (Hustedt) Lang Li, Yuhang Li & Changping Chen, comb. nov. and Gomphonemopsis platypus (Østrup) Lang Li, Yuhang Li & Junxiang Lai, comb. nov. are proposed. This study increases the records and knowledge of Gomphonemopsis along the coast of China.

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Research Article Tue, 26 Mar 2024 19:41:03 +0200
Beyond nutmeg, mace, and cloves: Checklist of the liverworts and hornworts of Maluku Islands (Moluccas), Indonesia https://phytokeys.pensoft.net/article/116679/ PhytoKeys 239: 107-193

DOI: 10.3897/phytokeys.239.116679

Authors: Ainun Nadhifah, Ida Haerida, Fandri Sofiana Fastanti, Lars Söderström, Anders Hagborg, Matt von Konrat

Abstract: The first ever liverwort and hornwort checklist is provided for the Maluku Islands (Moluccas/Spice Islands) of Indonesia. We report 355 accepted and 16 doubtful species and reject 22 species previously reported for Maluku Islands. The list is based on the specimens housed in the Herbarium Bogoriense (BO) and reports from over 500 literature references, including monographs, regional studies, and molecular investigations. The Maluku Islands are part of the Wallacea Biodiversity Hotspot with many unique species found only in Wallacea. Publications focusing on liverworts and hornworts of Maluku Islands are few and scattered. Considering regionally widespread species that have been recorded elsewhere, we predict that further fieldwork exploring the diversity of habitats coupled with collections unveiled from regional herbaria, a number of new records remain to be reported.

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Checklist Tue, 19 Mar 2024 17:38:51 +0200
Taxonomic revision of Camellia (Theaceae) in Thailand https://phytokeys.pensoft.net/article/113878/ PhytoKeys 239: 29-57

DOI: 10.3897/phytokeys.239.113878

Authors: Dongwei Zhao

Abstract: Natural plants of Camellia (Theaceae) in Thailand are taxonomically revised with a key, a distribution map, descriptions, specimens examined, and figures of living plants and/or dry specimens. Nine taxa comprising seven species and two varieties are recognized, including C. caudata, C. connata, C. furfuracea, C. kissi, C. kissi var. confusa, C. laotica, C. sinensis var. assamica, C. suddeeana, and C. taliensis. Camellia caudata and C. laotica are new records to Thailand, and C. connata and C. suddeeana are endemic to the country. Formerly recorded C. pleurocarpa and C. tenii are excluded from Thai flora because of misidentification, and C. oleifera and C. sinensis are merely cultivated in the country. Morphological descriptions of C. connata and C. laotica are improved based on additional collections examined.

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Research Article Tue, 5 Mar 2024 15:59:41 +0200
A new species of Typhonium (Araceae) from Vietnam https://phytokeys.pensoft.net/article/112973/ PhytoKeys 238: 119-126

DOI: 10.3897/phytokeys.238.112973

Authors: Hong Truong Luu, Nga Nguyen-Phi, Quoc Dat Nguyen, Hieu Cuong Nguyen, Hong Thien Van, Xuan Bach Nguyen-Le

Abstract: Typhonium obtusum is described as a new species endemic to Vietnam. It is unique in the genus in having an oblong-elliptic spathe limb with an obtuse apex and yellowish-greenish filiform staminodes with a down-curved acumen. The ecology, distribution and assessment of the conservation status of the new taxon, as well as a key to all known Typhonium species in Vietnam, are provided.

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Research Article Fri, 16 Feb 2024 10:25:37 +0200
Four new species of Perilimnastes (Sonerileae, Melastomataceae) from Vietnam https://phytokeys.pensoft.net/article/112133/ PhytoKeys 235: 1-19

DOI: 10.3897/phytokeys.235.112133

Authors: Jin-Hong Dai, Truong Van Do, Ying Liu

Abstract: Perilimnastes is a genus currently treated in the polyphyletic Phyllagathis. Recent phylogenomic analyses have identified a morphologically cohesive lineage referred to as the Phyllagathis (raphides) clade, which should be excluded from Phyllagathis and treated as a distinct genus under the name Perilimnastes. Morphological and phylogenomic data have confirmed that four new species collected from Vietnam are part of the Phyllagathis (raphides) clade. They are described herein as Perilimnastes multisepala, P. setipetiola, P. uniflora, and P. banaensis. Perilimnastes multisepala is phylogenetically closest to Phyllagathis setotheca, and morphologically to P. fruticosa and P. stenophylla, but is distinct in the 4- to 8-lobed calyx, 28 × 9 mm, apically long acuminate petals, and 1–2 mm pedicel at fruiting stage. Perilimnastes setipetiola, P. uniflora, and P. banaensis are phylogenetically most closely related. Perilimnastes uniflora is characterized by its prostrate habit, small size, glabrous, obovate to obovate-lanceolate leaf blade, and solitary flower. Perilimnastes setipetiola and P. banaensis resemble each other in habit, leaf size and shape, and sessile or near sessile inflorescences but can be easily distinguished by the indumentum of the stems and leaves.

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Research Article Fri, 3 Nov 2023 12:00:03 +0200
Taxonomic revision of Camellia langbianensis (Theaceae) with four new synonyms https://phytokeys.pensoft.net/article/110218/ PhytoKeys 234: 275-281

DOI: 10.3897/phytokeys.234.110218

Authors: Dongwei Zhao

Abstract: Based on analysis of morphologically diagnostic characters, Camellia langbianensis, a yellow camellia native to southern Vietnam, is taxonomically revised to include four new heterotypic synonyms: C. decora, C. dongnaiensis, C. oconoriana and C. tadungensis. Camellia vidalii is retained in the synonymy of C. langbianensis. Updated description and distribution map for C. langbianensis are provided.

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Research Article Thu, 26 Oct 2023 11:48:02 +0300
Lithocarpus tapanuliensis (Fagaceae), a new stone oak from northern Sumatra and its role as an important resource for critically endangered orangutans https://phytokeys.pensoft.net/article/106015/ PhytoKeys 234: 167-179

DOI: 10.3897/phytokeys.234.106015

Authors: Try Surya Harapan, Wei Harn Tan, Thoriq Alfath Febriamansyah, Nurainas, Syamsuardi, Joeri Sergej Strijk

Abstract: A new species of stone oak, Lithocarpus tapanuliensis Harapan, W.H.Tan, Nurainas & Strijk from South Tapanuli, North Sumatra, Indonesia is described. We provide colour photographs, a distribution map and a new IUCN conservation status assessment for inclusion on the global Red List. The unique cupule morphology, particularly the shape, placement and distinctness of the cupule protuberances, are distinctive from other Lithocarpus species in the region. Ecological interactions (e.g. consumption and nesting) with Tapanuli orangutans were recorded in the field.

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Research Article Fri, 20 Oct 2023 14:05:07 +0300
An unexpected new tree species from Gansu, China: Illicium gansuense (Schisandraceae) https://phytokeys.pensoft.net/article/102754/ PhytoKeys 230: 301-307

DOI: 10.3897/phytokeys.230.102754

Authors: Zengfu Bai, Zhihua Zhang, Xuelin Chen, Ji Zhang

Abstract: We describe the newly-discovered species Illicium gansuense (Schisandraceae), discovered in the Yuhe area of Giant Panda National Park, Gansu, China. Morphologically, I. gansuense resembles I. ternstroemioides and I. arborescens. However, the new species can be distinguished by its smaller leaf size, the larger number of tepals, tepal margin ciliate, and distinct flowering and fruiting seasons.

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Research Article Fri, 25 Aug 2023 12:41:26 +0300
Seven Epithemia taxa (Bacillariophyta) from Lake Akan (Japan) and their salinity tolerances https://phytokeys.pensoft.net/article/104449/ PhytoKeys 229: 139-155

DOI: 10.3897/phytokeys.229.104449

Authors: Takashi Chiba, Yoshifumi Horie, Akihiro Tuji

Abstract: The ecologies (salinity tolerance) of many diatoms are largely unknown, despite their potential to contribute to more detailed paleoenvironmental reconstructions. This study therefore aimed to investigate the relationship between diatom species and salinity. We cultured seven cosmopolitan benthic diatom species obtained from Lake Akan, a freshwater inland lake in Japan: Epithemia adnata, E. frickei, E. gibba, E. operculata, E. sorex, E. sp. and E. turgida. Each species was cultured at eleven salinities between 0‰ and 50‰. Epithemia adnata, E. frickei and E. sorex had the highest growth rate at a salinity of 3‰, with no further increase observed above 25‰. However, E. gibba had the highest growth rate at a salinity of 5‰, with no increase at salinities ≥ 30‰. These results suggest that E. adnata, E. frickei, E. gibba, and E. sorex grow in freshwater to brackish-water environments. Epithemia operculata and E. sp. proliferated at all salinities, indicating that they can adapt to hypersaline environments. However, E. turgida did not survive in salinities >10‰, making it the species with the narrowest salinity tolerance range. These results provide new knowledge that improves the understanding of the ecology of these species in modern environments and offer insights into paleoenvironmental reconstructions through diatom analysis.

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Research Article Tue, 18 Jul 2023 18:05:41 +0300
Malus includes Docynia (Maleae, Rosaceae): evidence from phylogenomics and morphology https://phytokeys.pensoft.net/article/103888/ PhytoKeys 229: 47-60

DOI: 10.3897/phytokeys.229.103888

Authors: Guang-Ning Liu, Dai-Kun Ma, Chao Xu, Jian Huang, Bin-Jie Ge, Qiang Luo, Yu Wei, Bin-Bin Liu

Abstract: Docynia has been treated as a separate genus or merged into Cydonia or Docyniopsis. Our phylogenomic evidence from 797 single-copy nuclear genes and plastomes confirmed the sister relationship between Docynia and Docyniopsis. By integrating the phylogenomic and morphological evidence, we propose to accept a broad generic concept of Malus and merge Docynia into Malus. Three new combinations are also made here: Malus delavayi (Franch.) B.B.Liu, M. indica (Wall.) B.B.Liu and M. longiunguis (Q.Luo & J.L.Liu) B.B.Liu.

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Short Communication Fri, 7 Jul 2023 16:56:35 +0300
Insect herbivore and fungal communities on Agathis (Araucariaceae) from the latest Cretaceous to Recent https://phytokeys.pensoft.net/article/99316/ PhytoKeys 226: 109-158

DOI: 10.3897/phytokeys.226.99316

Authors: Michael P. Donovan, Peter Wilf, Ari Iglesias, N. Rubén Cúneo, Conrad C. Labandeira

Abstract: Agathis (Araucariaceae) is a genus of broadleaved conifers that today inhabits lowland to upper montane rainforests of Australasia and Southeast Asia. A previous report showed that the earliest known fossils of the genus, from the early Paleogene and possibly latest Cretaceous of Patagonian Argentina, host diverse assemblages of insect and fungal associations, including distinctive leaf mines. Here, we provide complete documentation of the fossilized Agathis herbivore communities from Cretaceous to Recent, describing and comparing insect and fungal damage on Agathis across four latest Cretaceous to early Paleogene time slices in Patagonia with that on 15 extant species. Notable fossil associations include various types of external foliage feeding, leaf mines, galls, and a rust fungus. In addition, enigmatic structures, possibly armored scale insect (Diaspididae) covers or galls, occur on Agathis over a 16-million-year period in the early Paleogene. The extant Agathis species, throughout the range of the genus, are associated with a diverse array of mostly undescribed damage similar to the fossils, demonstrating the importance of Agathis as a host of diverse insect herbivores and pathogens and their little-known evolutionary history.

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Research Article Fri, 26 May 2023 11:05:36 +0300
Aspidistra daibuensis var. longkiauensis, a new variety of Aspidistra (Asparagaceae) from Taiwan, identified through morphological and genetic analyses https://phytokeys.pensoft.net/article/100885/ PhytoKeys 222: 129-151

DOI: 10.3897/phytokeys.222.100885

Authors: Chang-Tse Lu, Ming-Jen Yang, Min-Xin Luo, Jenn-Che Wang

Abstract: Aspidistra Ker Gawl. is one of the the most diverse and fastest-growing genera of angiosperm. Most Aspidistra species have been discovered in a limited area or a single site through morphological comparison. Because of the lack of population studies, morphological variation within species and the boundaries of some species remain unclear. In recent years, combining genetic and morphological markers has become a powerful approach for species delimitation. In this study, we performed population sampling and integrated morphometrics and microsatellite genetic diversity analyses to determine the species diversity of Aspidistra in Taiwan. We identified three species, namely Aspidistra attenuata Hayata; A. daibuensis Hayata var. daibuensis; A. mushaensis Hayata var. mushaensis; and reduced A. longiconnectiva C.T.Lu, K.C.Chuang & J.C.Wang to the variety level, and described a new variety, A. daibuensis Hayata var. longkiauensis. The description, diagnosis, distribution, and photographs of this new variety as well as a key to the known Taiwanese Aspidistra are provided.

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Research Article Wed, 22 Mar 2023 18:07:55 +0200
Resurrection of Leucobryum scalare Müll.Hal. ex M.Fleisch. (Bryophyta, Leucobryaceae) based on phylogenetic and morphometric evidence https://phytokeys.pensoft.net/article/98990/ PhytoKeys 222: 27-47

DOI: 10.3897/phytokeys.222.98990

Authors: Patsakorn Tiwutanon, Kasidis Chaiyasut, H. Thorsten Lumbsch, Ekaphan Kraichak

Abstract: Leucobryum scalare was described in 1904 but its taxonomic status has been disputed, being reduced to a variety of Leucobryum aduncum or synonymized with Leucobryum aduncum. The taxonomic confusion of this taxon has remained unresolved. Hence, we revisited the taxonomic status of the taxon using phylogenetic and morphometric approaches. A total of 27 samples from Leucobryum aduncum var. aduncum and Leucobryum aduncum var. scalare were used to generate data from four markers, including ITS1, ITS2, atpB-rbcL spacer, and trnL-trnF. The concatenated dataset was used to reconstruct a phylogenetic tree. Both qualitative and quantitative morphological characters were measured and analyzed with Principal Component Analysis (PCA) and PERMANOVA. The results showed that the two taxa are closely related but they are reciprocally monophyletic. Both qualitative and quantitative characters could also separate Leucobryum aduncum var. scalare from Leucobryum aduncum var. aduncum as shown with PCA and PERMANOVA. We propose the resurrection of the species rank for Leucobryum scalare as separate from Leucobryum aduncum. This work highlights the need for a more thorough revision of Leucobryum to clarify the actual level of diversity in this genus.

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Research Article Mon, 20 Mar 2023 12:40:20 +0200
Solved at last: The Philippine endemic Psychotria philippensis is a synonym of Scyphiphora hydrophylacea (Rubiaceae, Scyphiphoreae) https://phytokeys.pensoft.net/article/97766/ PhytoKeys 221: 95-116

DOI: 10.3897/phytokeys.221.97766

Authors: Andreas Berger

Abstract: Psychotria philippensis (Rubiaceae) was described by Chamisso and Schlechtendal in 1829, was the first Psychotria name published for the Philippines and is currently considered a Philippine endemic. The name remained in a taxonomic limbo for almost two centuries as it was variously accepted, synonymized or considered obscure, probably because the type specimen in the Berlin herbarium was destroyed and no original material has survived or is currently known. A combined analysis of the information on morphology, type locality and ecology contained in the protologue and a review of relevant literature on the study of the name by various authors over the last two centuries finally clarified the identity of P. philippensis. The name is confirmed here as a synonym of the rubiaceous mangrove Scyphiphora hydrophylacea, as first proposed by Schumann, one of the authorities of the family in the late 19th century, and the application of P. philippensis is fixed by neotypification. This reduces the number of Philippine species of Psychotria by one, but fortunately, this is not happening through extinction, as has been the case with too many species of the highly endangered Philippine flora. In addition, the history of the discovery and study of S. hydrophylacea and its synonyms are described in detail, and one lectotype and one neotype are designated.

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Research Article Fri, 10 Mar 2023 21:05:33 +0200
Hedyotis konhanungensis (Rubiaceae): A new species from the central highlands of Vietnam https://phytokeys.pensoft.net/article/95895/ PhytoKeys 221: 73-84

DOI: 10.3897/phytokeys.221.95895

Authors: Bui Hong Quang, Khang Sinh Nguyen, Tuan Anh Le, Le Thi Mai Linh, Quoc Luan Nguyen, Duy Hoang Vu Ngo, Lei Wu, Suman Neupane

Abstract: A new species of Hedyotis L. (Rubiaceae), Hedyotis konhanungensis B.H. Quang, T.A. Le, K.S. Nguyen & Neupane, is described and illustrated from the central highlands of Vietnam based on morphological and phylogenetic evidence. The new species belongs to the morphologically diverse tribe Spermacoceae (ca. 1000 species) of the family Rubiaceae, which is represented by 70–80 species in Vietnam. The phylogenetic analysis, based on four DNA regions (ITS, ETS, petD, rps 16), confirms the new species’ placement within the genus Hedyotis – one of the largest genera in the tribe, comprising ca. 180 species across Asia and the Pacific. Hedyotis konhanungensis is morphologically distinct from all southeastern Asian Hedyotis L. in its set of traits such as leaf type (shape and thickness), growth habit, and floral parts (color of inflorescence axis and the shape of calyx lobes). The new species shows similarities with Hedyotis shenzhenensis, H. shiuyingiae, and H. yangchunensis from China in its herbaceous habit, fleshy ovate leaf blades, and dark purple floral parts, but it is phylogenetically distinct and can be distinguished from them by the following combination of morphological traits: habit with slightly smaller stature (<25 cm), broadly ovate or deltoid stipules with cuspidate apex and entire margin, and ovate or nearly ovate calyx lobes.

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Research Article Thu, 9 Mar 2023 10:50:03 +0200
Castanopsis corallocarpus (Fagaceae), a new species from Royal Belum (Perak) in Peninsular Malaysia https://phytokeys.pensoft.net/article/95991/ PhytoKeys 219: 1-10

DOI: 10.3897/phytokeys.219.95991

Authors: Wei Harn Tan, Lisa Ong, Joeri Sergej Strijk

Abstract: A new species from the Fagaceae family, Castanopsis corallocarpus Tan & Strijk, is described from Royal Belum State Park in Peninsular Malaysia. Here, we provide technical illustrations, colour images and a description of its conservation status and the collecting locality, in addition to a comparative analysis with other species in the region. The solitary nut of C. corallocarpus has a morphologically unique cupule, lined with rows of thick coral-like spines not seen in other Castanopsis species.

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Research Article Wed, 18 Jan 2023 17:17:45 +0200
Three new species of Mitrephora (Annonaceae) from Thailand https://phytokeys.pensoft.net/article/91582/ PhytoKeys 218: 93-107

DOI: 10.3897/phytokeys.218.91582

Authors: Charan Leeratiwong, Piya Chalermglin, Richard M. K. Saunders

Abstract: Three new Mitrephora species (Annonaceae), M. langsuanensis sp. nov., M. sirindhorniae sp. nov. and M. sukhothaiensis sp. nov., are described from Thailand. Mitrephora langsuanensis resembles M. macclurei, but its leaves have more secondary veins, and its flowers have more carpels, with yellow-and-pink striped outer petals with a margin that becomes undulate with age. Mitrephora sirindhorniae resembles M. tomentosa, but has larger sepals and petals, longer flowering pedicels, and shorter monocarp stipes, with monocarps that have a longitudinal ridge. Mitrephora sukhothaiensis is distinct from its Thai congeners in having outer petals that reflex at maturity and inner petals with a pair of appendages on the margin adaxially. The addition of these three new taxa raises the total number of Mitrephora species in Thailand to 14. An identification key for Thai species is provided.

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Research Article Thu, 12 Jan 2023 10:54:56 +0200
Quercus mangdenensis, a new species of Quercus (Fagaceae) from Kon Tum Province, Vietnam https://phytokeys.pensoft.net/article/93684/ PhytoKeys 215: 73-79

DOI: 10.3897/phytokeys.215.93684

Authors: Nguyen Van Ngoc, Hoang Thi Binh

Abstract: Quercus mangdenensis Binh & Ngoc, sp. nov. (Fagaceae) is newly described from Mang Den Town in the central highland of Vietnam. The new species is characterized by lanceolate to oblong-lanceolate leaves with entire margin, 1–5-fruited infructescence, larger fruit size 6–10.5 cm long, broadly bowl-shaped cupules enclosing 1/5 of the nut, bracts of cupule entire and arranged in 5–7 rings, and cylindrical-ellipsoid and basally flat nuts 4.5–7.5 cm long. Quercus mangdenensis is morphologically similar to Q. bidoupensis Binh & Ngoc and Q. kontumensis A.Camus in having similar leaf shape, cuneate leaf base, and bracts arrangement in cupules. However, it differs from Q. bidoupensis and Q. kontumensis by cupules broadly bowl-shaped, much larger fruits, cylindrical-ellipsoid nut shape, and cupule enclosing 1/5 of the nuts. A description, photographs, and preliminary species conservation status of the new species are also provided.

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Research Article Thu, 15 Dec 2022 10:54:18 +0200
Microchirita minor (Gesneriaceae), a new species from north-western Vietnam https://phytokeys.pensoft.net/article/90859/ PhytoKeys 215: 65-71

DOI: 10.3897/phytokeys.215.90859

Authors: Zi-Bing Xin, Rui-Feng Li, Stephen Maciejewski, Long-Fei Fu, Truong Van Do, Fang Wen

Abstract: Microchirita minor (Gesneriaceae), a new species from the limestone area in Son La Province, north-western Vietnam, is described here. The new species resembles M. hamosa, but it differs by the combination of corolla tube shape, stamens number and the length of pistil. Detailed morphological description, together with photographic plates, information on phenology, distribution, ecology and preliminary conservation status of the new species are presented.

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Research Article Thu, 15 Dec 2022 10:53:03 +0200
A new synonym of Enkianthus perulatus (Ericaceae) in East Asia, based on morphological and molecular evidence https://phytokeys.pensoft.net/article/94294/ PhytoKeys 214: 61-74

DOI: 10.3897/phytokeys.214.94294

Authors: Hua Liang, Lu Jiang, Danqi Li, Yi Yang, Dengmei Fan, Zhiyong Zhang

Abstract: Enkianthus calophyllus was once treated as a synonym of E. serrulatus. However, field observations indicate that E. calophyllus is distinct from E. serrulatus but resembles E. perulatus in flowers, leaves, fruits and seeds. Hence, a taxonomic revision of these species was conducted based on morphological comparisons of flowers, leaves, fruits and seeds, as well as molecular analyses of nuclear ribosomal internal transcribed spacer (nrITS) and six plastid DNA markers (psbA-trnH, rpl32-trnL, trnL-trnF, rps16-trnQ, psbJ-petA and matK). The morphological and molecular results reject the synonymization of E. calophyllus with E. serrulatus, and instead show it to be placed in a clade with E. perulatus. Based on molecular evidence and a reassessment of the morphology we synonymize E. calophyllus with the older name E. perulatus.

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Research Article Fri, 25 Nov 2022 10:14:56 +0200
Morphological, ecological, and molecular phylogenetic approaches reveal species boundaries and evolutionary history of Goodyera crassifolia (Orchidaceae, Orchidoideae) and its closely related taxa https://phytokeys.pensoft.net/article/91536/ PhytoKeys 212: 111-134

DOI: 10.3897/phytokeys.212.91536

Authors: Kenji Suetsugu, Shun K. Hirota, Narumi Nakato, Yoshihisa Suyama, Shunsuke Serizawa

Abstract: Species delimitation within the genus Goodyera is challenging among closely related species, because of phenotypic plasticity, ecological variation, and hybridization that confound identification methods based solely on morphology. In this study, we investigated the identity of Goodyera crassifolia H.-J.Suh, S.-W.Seo, S.-H.Oh & T.Yukawa, morphologically similar to Goodyera schlechtendaliana Rchb.f. This recently described taxon has long been known in Japan as “Oh-miyama-uzura” or “Gakunan” and considered a natural hybrid of G. schlechtendaliana and G. similis Blume (= G. velutina Maxim. ex Regel). Because the natural hybrid between G. schlechtendaliana and G. similis was described as G. × tamnaensis N.S.Lee, K.S.Lee, S.H.Yeau & C.S.Lee before the description of G. crassifolia, the latter might be a synonym of G. × tamnaensis. Consequently, we investigated species boundaries and evolutionary history of G. crassifolia and its closely related taxa based on multifaceted evidence. Consequently, morphological examination enabled us to distinguish G. crassifolia from other closely related species owing to the following characteristics: coriaceous leaf texture, laxly flowered inflorescence, long pedicellate ovary, large and weakly opened flowers, and column with lateral appendages. Ecological investigation indicates that G. crassifolia (2n = 60) is agamospermous, requiring neither pollinators nor autonomous self-pollination for fruit set, whereas G. schlechtendaliana (2n = 30) is neither autogamous nor agamospermous but is obligately pollinator-dependent. MIG-seq-based phylogenetic analysis provided no evidence of recent hybridization between G. crassifolia and its close congeners. Thus, molecular phylogeny reconstructed from MIG-seq data together with morphological, cytological, and ecological analyses support the separation of G. crassifolia as an independent species.

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Research Article Fri, 4 Nov 2022 18:41:52 +0200
Phedimus daeamensis (Crassulaceae), a new species from Mt. Daeam in Korea https://phytokeys.pensoft.net/article/82604/ PhytoKeys 212: 57-71

DOI: 10.3897/phytokeys.212.82604

Authors: Tae-Young Choi, Dong Chan Son, Takashi Shiga, Soo-Rang Lee

Abstract: Phedimus individuals from Mt. Daeam, once referred to as Phedimus sikokianus, exhibit certain morphological characters that are unique within the genus. Phedimus is one of the most notorious groups for taxonomic problems due to the high morphological variation found in leaf shape, stem numbers, phyllotaxis and seed structure. Taxa in Phedimus also easily hybridize, further leading to taxonomic confusion. To carefully confirm the identity of the putative new species from Mt. Daeam, we examined morphological characters from ~100 herbarium sheets of six closely related Phedimus species. A molecular phylogenetic approach was also employed to delimit the species boundary and infer the phylogenetic relationships among the seven Phedimus species, including the species from Mt. Daeam. Both morphological and molecular phylogenetic results indicated that the species found on Mt. Daeam is a new species that is more closely related to P. middendorffianus and P. takesimensis than to the remaining four Phedimus species. Here, we provided a full description of the new species P. daeamensis as well as an updated key for the seven Phedimus species examined.

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Research Article Thu, 3 Nov 2022 10:52:09 +0200
 Polygonatum praecox (Asparagaceae), a new species from mid-eastern China revealed by morphological and molecular evidence https://phytokeys.pensoft.net/article/90456/ PhytoKeys 211: 125-138

DOI: 10.3897/phytokeys.211.90456

Authors: Yingfeng Hu, Yujun Liu, Maroof Ali, Wei Wu, Xiaohong Li, Longsheng Chen, Jianwen Shao

Abstract: A new species, Polygonatum praecox Y.F.Hu & J.W.Shao (Asparagaceae), is described and illustrated. This species is similar to P. cyrtonema, P. odoratum and P. caulialatum, but can be distinguished from P. cyrtonema by its racemose inflorescence, cylindrical hairless filaments and apex without a retrorse spur; from P. odoratum by its stout moniliform rhizome, straight stem and longer (1.7–2.2 cm long) floral tube; and from P. caulialatum by its upper part straight stem, yellowish-green corolla, lobes excurved and earlier flowering. The complete chloroplast genome of this new species is 155,115–155,256 bp in length. Phylogenetic analysis revealed that P. praecox is not genetically related to the above three morphological similar species, but is closely related to the two European species (P. multiforum and P. latifolium). This species is relatively common in mid-eastern China and has previously been confused with P. cyrtonema. As its wild resources have decreased in recent years due to over-exploitation for medicinal or edible purposes, we classify it as Near Threatened (NT) according to the IUCN Red List Criteria.

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Research Article Fri, 21 Oct 2022 14:13:58 +0300
Two new species of Boesenbergia (Zingiberaceae), from Sabah, Malaysia https://phytokeys.pensoft.net/article/83985/ PhytoKeys 211: 81-92

DOI: 10.3897/phytokeys.211.83985

Authors: Nyee Fan Lam, Halijah Ibrahim, Yen Yen Sam, Rozainah Mohammad Zakaria, Axel Dalberg Poulsen

Abstract: Two new species of Boesenbergia, B. sugudensis sp. nov. and B. truncata sp. nov. were discovered in Sabah, Malaysian Borneo. Boesenbergia sugudensis resembles B. imbakensis in that the leaf sheath of the plant is not thickened and in the anther thecae dehiscing by longitudinal slits, but differs in having a longer petiole and tubular calyx. Boesenbergia truncata resembles B. orbiculata by the short petiole and a bilobed calyx, but differs by the truncate leaf base, the acute leaf apex, opposite leaves with a narrower lamina parallel to the ground and anther thecae dehiscing by pores. The new species are described and illustrated in detail.

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Research Article Mon, 17 Oct 2022 07:21:24 +0300
 Hydrangea marunoi (Hydrangeaceae), a new species from Osumi Peninsula, southern Japan https://phytokeys.pensoft.net/article/89452/ PhytoKeys 211: 33-44

DOI: 10.3897/phytokeys.211.89452

Authors: Shuichiro Tagane, Shinji Fujii, Shun K. Hirota, Akiyo Naiki, Tetsukazu Yahara

Abstract: Hydrangea marunoi Tagane & S. Fujii, from the Kimotsuki Mountains in the Ohsumi Peninsula, southern Japan, is described and illustrated. It is morphologically similar to H. alternifolia in having three-petaloid calyx lobes in marginal flowers, but is distinguished by the larger stamen number, and longer styles and seeds. Multiplex ISSR genotyping by sequencing (MIG-seq) demonstrated that the new species is monophyletic and closely related to H. amamiohsimensis and H. moellendorffii rather than H. alternifolia.

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Research Article Tue, 11 Oct 2022 10:56:29 +0300
Smithia yehii (Leguminosae, Papilionoideae), a new species from Taiwan https://phytokeys.pensoft.net/article/90598/ PhytoKeys 210: 53-65

DOI: 10.3897/phytokeys.210.90598

Authors: Chiu-Mei Wang, Chih-Yi Chang, Yen-Hsueh Tseng

Abstract: A new species of Smithia Aiton, S. yehii C.M.Wang, Chih Y.Chang & Y.H.Tseng, sp. nov. from the wetlands of Taiwan is reported in this article. This species was mistakenly identified as S. sensitiva Aiton, but can be distinguished by its pale yellow corolla (vs. vivid yellow), often smaller flowers and shorter style. There is also a color gradient on the adaxial surface of the leaflets between young and mature leaves. Surface sculpture of pollen of S. yehii has significantly larger perforations, and muri are wider than those of S. sensitiva. An identification key to the Smithia taxa of Taiwan and S. sensitiva is presented.

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Research Article Thu, 29 Sep 2022 13:02:50 +0300
A new marine epipsammic diatom species, Ambo dajingensis sp. nov. (Bacillariophyceae), from the coast of Southeast China https://phytokeys.pensoft.net/article/90876/ PhytoKeys 210: 23-34

DOI: 10.3897/phytokeys.210.90876

Authors: Honghan Liu, Zhen Wang, Weiwei Wu, Chenhong Li, Jiawei Zhang, Yahui Gao, Xuesong Li, Lin Sun, Junrong Liang, Jun Zhang, Changping Chen

Abstract: Ambo dajingensis HH Liu, Z Wang, YH Gao & CP Chen, sp. nov. is described as a new species in samples collected from sand grains at Dajing Beach, Ningde City, Fujian Province, China. Morphological details of the new species with respect to valve shape, size and valve ultrastructure are presented based on light microscopy (LM) and scanning electron microscopy (SEM). The main features of Ambo dajingensis under a light microscope are elongated elliptic valves with rounded apices, two internal costae on the valve and rectangular in girdle views. SEM observation showed that externally, the frustules are comprised of two valves with a relatively deep mantle and a transition between the valve faces. Small, flabelliform spines are present along the valve margin. Internally, the valves are divided into three sectors by robust costae, which penetrate the whole valve lumen and are thickest at the mantle interior and thinner toward the center. The sternum is narrow and linear, visible only in the valve apex, set off by costae. The striae are comprised of small, round areolae and they are parallel in the middle to slightly radiate at the apices. The new species is compared with other species in the genus Ambo.

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Research Article Wed, 28 Sep 2022 10:47:38 +0300
Lycoris insularis (Amaryllidaceae), a new species from eastern China revealed by morphological and molecular evidence https://phytokeys.pensoft.net/article/90720/ PhytoKeys 206: 153-165

DOI: 10.3897/phytokeys.206.90720

Authors: Si-Yu Zhang, Hao-Tian Wang, Ying-Feng Hu, Wei Zhang, Song Hu, Jian-Wen Shao

Abstract: Lycoris insularis S.Y.Zhang & J.W.Shao, a new fertile diploid species from coastal provinces in eastern China is described. This new species is most similar to L. sprengeri in morphology and has been misidentified as the latter for a long time. However, it can be distinguished from the latter by the relatively longer perianth tube (1.5‒2.5 cm vs. less than 1.3 cm), a characteristic that was overlooked before. Phylogenetic analysis, based on complete plastid genome, showed that L. insularis is not genetically related to L. sprengeri in the genus. The former was a sister group of L. sanguinea, while the latter was closely related to L. longituba and L. chinensis and they were respectively located on different clades that were separated at the base of the phylogenetic tree. The chromosome number of L. insularis is 2n = 22. At present, as the new species is relatively widely distributed and the wild population can normally reproduce by seeds, we evaluate it as LC (Least Concern) according to criteria of the IUCN Red List.

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Research Article Mon, 19 Sep 2022 19:10:53 +0300
A new species of Quercus genus (Fagaceae) from Son Tra Peninsula, Central Vietnam https://phytokeys.pensoft.net/article/85635/ PhytoKeys 206: 61-73

DOI: 10.3897/phytokeys.206.85635

Authors: Nguyen Van Ngoc, Hoang Thi Binh, Hoang Thanh Son, Yoshihisa Suyama, Tetsukazu Yahara

Abstract: A new species, Quercus sontraensis Ngoc, Binh & Son is described from Son Tra Nature Reserve, Son Tra Peninsula, Central Vietnam. We examined the morphology and constructed a highly resolved phylogeny of Q. sontraensis and its relatives (including Q. langbianensis and Q. cambodiensis) using Multiplex ISSR genotyping by sequencing (MIG-seq). The morphological analyses and molecular evidence support the distinction between the new species (Q. sontraensis) and its relatives.

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Research Article Fri, 26 Aug 2022 14:36:35 +0300
Phylogeny and classification of the Australasian and Indomalayan mimosoid legumes Archidendron and Archidendropsis (Leguminosae, subfamily Caesalpinioideae, mimosoid clade) https://phytokeys.pensoft.net/article/79381/ PhytoKeys 205: 299-333

DOI: 10.3897/phytokeys.205.79381

Authors: Gillian K. Brown, Javier Aju, Michael J. Bayly, Daniel J. Murphy, Todd G. B. McLay

Abstract: The morphologically variable genus Archidendron is the second largest mimosoid legume genus from the Indomalayan-Australasian region, yet it has not been well represented in phylogenetic studies. Phylogenies that have included multiple representatives of Archidendron suggest it may not be monophyletic, and the same applies to Archidendropsis, another understudied genus of the Archidendron clade. The most comprehensive phylogeny of Archidendron and Archidendropsis to date is presented, based on four nuclear markers (ITS, ETS, SHMT and RBPCO). Exemplars from all genera of the wider Archidendron clade are sampled, including representatives of all series within Archidendron and the two subgenera of Archidendropsis. Our results confirm that Archidendron and Archidendropsis are not monophyletic. Within Archidendron, only one series (ser. Ptenopae) is resolved as monophyletic and species of Archidendron are divided into two primarily geographic lineages. One clade is distributed in western Malesia and mainland Asia and includes most representatives of series Clypeariae, while the other is mostly restricted to eastern Malesia and Australia and includes representatives of the seven other series plus two samples of series Clypeariae. No taxonomic changes are made for Archidendron due to the high level of topological uncertainty and the lack of discrete macromorphological characters separating these two lineages. Each of the two subgenera of Archidendropsis is monophyletic but they are not closely related. A new genus endemic to Queensland (Australia), Heliodendron Gill.K. Br. & Bayly, gen. nov., is described for the former Archidendropsis subg. Basaltica, and combinations for its three species are proposed: Heliodendron basalticum (F. Muell.) Gill.K. Br. & Bayly, comb. nov., Heliodendron thozetianum (F. Muell.) Gill.K. Br. & Bayly, comb. nov., and Heliodendron xanthoxylon (C.T. White & W.D. Francis) Gill.K. Br. & Bayly, comb. nov.

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Research Article Mon, 22 Aug 2022 19:00:11 +0300
Taxonomic study of a novel terrestrial alga, Spongiosarcinopsis qinghaiensis sp. nov. (Protosiphonaceae, Chlorophyta), from the Qinghai-Tibet Plateau https://phytokeys.pensoft.net/article/84886/ PhytoKeys 204: 83-95

DOI: 10.3897/phytokeys.204.84886

Authors: Qiufeng Yan, Huan Zhu, Jiao Fang, Benwen Liu, Guoxiang Liu

Abstract: There is only one species of Spongiosarcinopsis in the literature currently. It was found in gray soil in Russia for the first time. According to molecular data analysis results, the isolated algal strain is most closely related to Spongiosarcinopsis terrestris. Unlike Spongiosarcinopsis terrestris, the isolated strain was found on soil surfaces at high altitudes, the young vegetative cell is spherical, vegetative cells are relatively large, and pyrenoids are generally fewer. In view of such morphological differences, phylogenetic analysis results, and comparison of ITS2 secondary structure and ultrastructure, the strain isolated in the present study was proposed to be a novel species.

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Research Article Thu, 11 Aug 2022 20:16:12 +0300
Reinstatement of species rank for Grimmia limprichtii (Bryophyta, Grimmiaceae) based on molecular and morphological data https://phytokeys.pensoft.net/article/82508/ PhytoKeys 204: 9-21

DOI: 10.3897/phytokeys.204.82508

Authors: Chao Feng, Jin Kou, Ting-Ting Wu, Guo-Li Zhang

Abstract: The genus Grimmia Hedw. has been considered taxonomically difficult because of its great morphological variability, and its treatments by different specialists have led to incongruent results. One of the debates in the genus is the species status of Grimmia limprichtii Kern, an Asian-European disjunct moss species that has been considered identical to Grimmia anodon Bruch & Schimp. or Grimmia tergestina Tomm ex Bruch & Schimp. It has also been regarded as the muticous-leaved male plants of G. tergestina. Based on a detailed analysis of the type and many non-type specimens combining the molecular and morphological data, the reinstatement of species rank for G. limprichtii is proposed. The diagnostic characteristics of G. limprichtii and its distinction from some closely related species, with which it may be confused, are discussed. Grimmia obtusifolia C. Gao & T. Cao is considered a synonym of G. limprichtii based on molecular and morphological data.

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Research Article Tue, 2 Aug 2022 10:29:15 +0300
A comprehensive checklist of the deciduous photinia genus Pourthiaea (Maleae, Rosaceae), with emphasis on their validity and typification https://phytokeys.pensoft.net/article/85822/ PhytoKeys 202: 1-33

DOI: 10.3897/phytokeys.202.85822

Authors: Yi-Lei Lou, Ze-Tao Jin, Dai-Kun Ma, Bin-Bin Liu

Abstract: Due to the complicated evolutionary history in Pourthiaea, ninety-seven taxa have been described since 1784, and ninety-one of them are validly published taxa, five are naked names, and one is an invalid name. After a comprehensive and critical evaluation, 213 names have been published, including new combinations, new status, and new names; this may be due to the controversial taxonomic position of Pourthiaea in the apple tribe, Maleae. We herewith provide a taxonomic checklist of Pourthiaea for further taxonomic and evolutionary studies. We also lectotypify two taxa: Photinia amphidoxa var. stylosa and P. glabra var. fokienensis.

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Checklist Tue, 19 Jul 2022 15:25:46 +0300
First record of functional underground traps in a pitcher plant: Nepenthes pudica (Nepenthaceae), a new species from North Kalimantan, Borneo https://phytokeys.pensoft.net/article/82872/ PhytoKeys 201: 77-97

DOI: 10.3897/phytokeys.201.82872

Authors: Martin Dančák, Ľuboš Majeský, Václav Čermák, Michal R. Golos, Bartosz J. Płachno, Wewin Tjiasmanto

Abstract: Nepenthes pudica, a new species from North Kalimantan, Indonesia, is described and illustrated. The species belongs to the N. hirsuta group (sensu Cheek and Jebb 1999) but exhibits some characters that are unique within the group or even within the genus. Above all, it produces underground, achlorophyllous shoots with well-developed, ventricose lower pitchers that form in soil cavities or directly in the soil. No lower pitchers are formed above ground. The main part of its prey are ants, besides other litter- and soil-inhabiting species of invertebrates. A number of infaunal species were found in both aerial and underground pitchers, mainly Diptera and nematodes. Nepenthes pudica is known only from a few neighbouring localities in the Mentarang Hulu district of North Kalimantan, where it grows on ridgetops at an elevation of 1100–1300 m. Its discovery underlines the natural richness of Borneo’s rainforest and the necessity to preserve this important ecosystem with its enormous and still undiscovered biodiversity.

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Research Article Thu, 23 Jun 2022 17:27:26 +0300
Lepisorus medioximus (Polypodiales, Polypodiaceae), a new species from Shan State of Myanmar https://phytokeys.pensoft.net/article/84911/ PhytoKeys 201: 23-34

DOI: 10.3897/phytokeys.201.84911

Authors: Tao Fujiwara, Phyo Kay Khine, Kiyotaka Hori, Thant Shin, Noriaki Murakami, Harald Schneider

Abstract: A new species of the species-rich fern genus Lepisorus (Polypodiales, Polypodiaceae) has been found to occur in Shan state, Myanmar. Lepisorus medioximus is described based on morphological characters and phylogenetic evidence. Phylogenetic analyses showed that the specimens of L. medioximus formed a distinct clade nested in the Pseudovittaria clade. The morphological comparison demonstrated that the species is distinct from phylogenetically related species, namely L. elegans, L. contortus, and L. tosaensis, in the morphology of the rhizome scales, size, and shape of the lamina, position of sori, and paraphyses.

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Research Article Mon, 20 Jun 2022 12:35:43 +0300
 Primula xinningensis (Primulaceae), a new species from karst caves in Hunan, China https://phytokeys.pensoft.net/article/85231/ PhytoKeys 199: 155-166

DOI: 10.3897/phytokeys.199.85231

Authors: Wei Zhang, Yu Zhang, Jian Wen Shao

Abstract: Primula xinningensis Wei Zhang bis & J.W.Shao, a new species from Hunan Province, China, is described. Its leaf morphology is similar to the P. merrilliana complex and flower morphology similar to P. cicutariifolia, but it can be distinguished from the former by the black pollen sac, corolla lobes apex obviously emarginate and can be differed from the latter by cotyledon triangular obovate, plants densely covered with glandular hairs and special habitat (karst caves). The whole plastid genome of this new species is 151, 601–151, 630 bp in length. Based on the whole plastid genome sequences, phylogenetic trees revealed that the new species did not genetically relate to the above two mentioned morphologically similar species, but it was closely related to P. hubeiensis. Currently, only three populations were discovered within a small distribution area, thus, it is preliminarily considered as Vulnerable (VU) according to criteria of the IUCN Red List.

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Research Article Mon, 13 Jun 2022 14:07:25 +0300
Thylacopteris minuta (Polypodiaceae), a new fern species from Myanmar https://phytokeys.pensoft.net/article/83107/ PhytoKeys 199: 141-153

DOI: 10.3897/phytokeys.199.83107

Authors: Kiyotaka Hori, Phyo Kay Khine, Tao Fujiwara, Thant Shin, Harald Schneider

Abstract: The genus Thylacopteris is a small, phylogenetically isolated genus belonging to the fern family Polypodiaceae. This study describes a new species, Thylacopteris minuta, based on collections obtained during field surveys of Shan State, Myanmar. This new species is distinct from other species of Thylacopteris in its small size and presence of sclerenchyma strands in the rhizome. This species is also distinct from the only other species of Thylacopteris with molecular data available, T. papillosa, in a plastid rbcL phylogeny of Polypodiaceae. This new discovery of Thylacopteris from Myanmar suggests that this genus is still overlooked in Southeast Asia.

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Research Article Thu, 9 Jun 2022 15:11:33 +0300
A new species of Prunus subgen. Cerasus from Central China https://phytokeys.pensoft.net/article/84354/ PhytoKeys 199: 1-7

DOI: 10.3897/phytokeys.199.84354

Authors: Song-Zhi Xu, Qi-Liang Gan, Zhen-Yu Li

Abstract: A new species, Prunus wangii Q.L.Gan, Z.Y.Li & S.Z.Xu from western Hubei, Central China is described and illustrated. It is morphologically similar to P. clarofolia Schneid. and P. pseudocerasus Lindl., but differs in larger height, nearly erect branches, densely and horizontally arranged lenticels, straight lateral veins of leaves, persistent brownish bracts, reflexed and entire calyx lobes, 2-lobed petals with narrowly triangular sinus, earlier flowering and broadly ellipsoid fruits. Furthermore, P. wangii blooms in late February and the colour of flower changes with time, which makes it possible to be a new breeding material for ornamental cherry with early spring blooms.

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Research Article Thu, 2 Jun 2022 19:03:39 +0300
A phylogenetic and morphological study of the Tectaria fuscipes group (Tectariaceae), with description of a new species https://phytokeys.pensoft.net/article/80452/ PhytoKeys 195: 75-92

DOI: 10.3897/phytokeys.195.80452

Authors: Shi-Yong Dong, Shu-Hang Li, Ling Huang, Shi-Shi Tan, Zheng-Yu Zuo

Abstract: The fern species Tectaria fuscipes and morphologically similar species, which are common in tropical and subtropical mainland Asia, constitute a taxonomically confusing group. To better understand species boundaries and relationships within the T. fuscipes group, we conducted phylogenetic analyses of five plastid regions and morphological observations of herbarium specimens and living plants. As a result, we produced a generally well-resolved phylogeny of the T. fuscipes group and related species in Asia. The phylogenetic analyses supported the monophyly of the T. fuscipes group, which includes T. dissecta, T. fuscipes, T. ingens, T. paradoxa, T. setulosa, T. subfuscipes, T. subsageniacea and a new species, but excludes T. kusukusensis. However, T. fuscipes, T. subfuscipes and T. subsageniacea are almost indistinguishable in morphology, which form a complex characterised by the black linear-lanceolate stipe scales. The new species found in southern China and Vietnam is described here as T. fungii. It is similar to the T. fuscipes complex and T. kusukusensis, but differs from the former mainly by its brown-castaneous lanceolate stipe scales and from the latter by having nearly hairless laminae (versus frond axes abaxially bearing copious hairs).

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Research Article Mon, 9 May 2022 17:53:21 +0300
Vaccinium bangliangense, a new species of Ericaceae from limestone areas in Guangxi, China https://phytokeys.pensoft.net/article/81018/ PhytoKeys 194: 23-31

DOI: 10.3897/phytokeys.194.81018

Authors: Yu-Song Huang, Shi-Yue Nong, Xing-Kang Li, Gao Xie, Yi-Hua Tong

Abstract: Vaccinium bangliangense, a new species from limestone areas in Guangxi, China, is described and illustrated. It is morphologically most similar to V. pseudotonkinense and V. sciaphilum in having small and dense obovate leaf blades with a retuse apex, hairy young branches and calyx and campanulate corollas, but can be distinguished from them by the distance of basal gland from petiole, the length of peduncle, pedicle and filaments, the indumentum of calyx tube and corolla and the existence of apical glands on calyx lobes. A table to distinguish the new species from other morphologically similar Vaccinium species, as well as colour plates of comparison of key characters, is also provided.

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Research Article Mon, 11 Apr 2022 17:23:22 +0300
Tectaria danangensis (Tectariaceae), a new fern species from Vietnam https://phytokeys.pensoft.net/article/80129/ PhytoKeys 194: 1-13

DOI: 10.3897/phytokeys.194.80129

Authors: Van The Pham, Shu-Han Li, Shi-Yong Dong

Abstract: A new fern species, Tectaria danangensis (Tectariaceae) from Vietnam, which had long been misreported as T. crenata, is described and illustrated. The new species resembles T. poilanei, a species long neglected in the fern flora of Indochina, in the frond shape and sori arrangement, but differs by its irregularly 2-rowed sori (versus regularly 2-rowed, distantly and evenly arranged) between lateral veins of pinnae, fronds being more or less dimorphic (versus monomorphic) and basal pinnae each with a base-joined (versus free) lobe. Phylogenetic analyses of five plastid regions (atpB, ndhF + ndhF-trnN, rbcL, rps16-matK + matK and trnL-F) suggested T. danangensis has a close affinity to T. harlandii. Tectaria danangensis appears to be an intermediate species between T. harlandii and T. poilanei.

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Research Article Mon, 11 Apr 2022 09:53:57 +0300
Elsholtzia zhongyangii (Lamiaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/80327/ PhytoKeys 193: 77-88

DOI: 10.3897/phytokeys.193.80327

Authors: Xin-Jie Jin, Yue Huang, Yu-Kun Wei, Qing Ma, Lu-Xian Liu, Zhi-Xi Fu, Gui-Fang Wu, Yong-Hua Zhang, Pan Li

Abstract: Elsholtzia zhongyangii (Lamiaceae), a new species from Sichuan Province, China, is described and illustrated. The new species is morphologically similar to E. feddei f. feddei, but it can be easily distinguished from E. feddei f. feddei by smaller corolla (3.2–3.5 mm vs. 4.5–5.3 mm), bract indumentum (glabrous, except margin ciliate vs. villous, especially on veins abaxially, glabrous adaxially) and bract stalked (ca. 1.2 mm vs. sessile). Phylogenetic analyses, based on two nuclear ribosomal (ETS, ITS) and five plastid (rbcL, matK, trnL-F, ycf1, ycf1-rps15) regions, confirmed that the new species formed a monophyletic clade with robust support. The new species is currently known from western Sichuan.

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Research Article Tue, 22 Mar 2022 09:42:51 +0200
Impatiens bijieensis (Balsaminaceae), a new species from karst plateau in Guizhou, China https://phytokeys.pensoft.net/article/77517/ PhytoKeys 192: 1-10

DOI: 10.3897/phytokeys.192.77517

Authors: Liu-Yi Ren, Yi Chen, Tao-Hua Yuan, Rong-Xin Huang, Mei-Jun Li, Xin-Xiang Bai

Abstract: Impatiens bijieensis X.X. Bai & L.Y. Ren, sp. nov. from northwest Guizhou Province, China, is described and illustrated. This new species is distributed discontinuously in Jiulongshan, Dafang County and Dajiucaiping, Hezhang County, both of which are in the Wumeng Mountain area, a karst plateau landform. The new species is morphologically similar to I. pterosepala Hook.f., I. lasiophyton Hook.f. and I. leptocaulon Hook.f. in height and flower shape and it especially resembles I. lasiophyton in pilosity. However, it differs in its deep purplish-red flower, 2-lobed lower sepal apex and cylindrical capsule. A detailed description, colour photographs and a provisional IUCN Red List assessment are provided along with discussions of its geographical distribution, ecology and morphological relationships with other similar species.

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Research Article Fri, 4 Mar 2022 18:11:57 +0200
A natural hybrid of Sindora (Fabaceae, Detarioideae) from Singapore https://phytokeys.pensoft.net/article/79185/ PhytoKeys 190: 87-102

DOI: 10.3897/phytokeys.190.79185

Authors: Le Min Choo, Adrian Hock Beng Loo, Wee Foong Ang, Kenneth Boon Hwee Er

Abstract: Sindora × changiensis L.M.Choo, Loo, W.F.Ang & K.Er is a new hybrid from the subfamily Detarioideae in Fabaceae. This is the first reported instance of natural hybridisation in Sindora. Based on population genetics analyses using ddRAD and morphological observations, this taxon represents a fertile hybrid between Sindora coriacea and Sindora echinocalyx. This new hybrid is so far only known to occur naturally from Changi at the north-eastern coast of Singapore. It has pods that are sparsely spiny. This is intermediate between the smooth, non-spiny pods of S. coriacea, and the densely spiny pods of S. echinocalyx. The calyx is smooth and unarmed, resembling S. coriacea. Last but not least, the ovary is entirely pubescent, different from S. coriacea and S. echinocalyx. The ovary of S. coriacea has a glabrous patch in the middle, while that of S. echinocalyx has minute spines protruding from the dense pubescence. A taxonomic description and an updated key to the Sindora of Singapore and Peninsular Malaysia are also provided.

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Research Article Wed, 23 Feb 2022 16:45:54 +0200
Achnanthidium bratanense sp. nov. (Bacillariophyceae, Achnanthidiaceae), a new diatom from the Lake Bratan (Bali, Indonesia) https://phytokeys.pensoft.net/article/77882/ PhytoKeys 188: 167-175

DOI: 10.3897/phytokeys.188.77882

Authors: Dmitry A. Kapustin, Anton M. Glushchenko, Maxim S. Kulikovskiy

Abstract: A new species, Achnanthidium bratanense, is described from Lake Bratan, located on the island of Bali (Indonesia). The morphology of this species was analyzed with light (LM) and scanning electron microscopy (SEM). A. bratanense is characterized by linear-elliptic to nearly elliptic valves with convex margins and rounded, broadly subcapitate apices. The striae of this species are hardly discernable under LM; they are weakly radiate throughout the valve and composed of one to four large transapically elongated areolae of different length and shape. The most similar taxon to A. bratanense is A. macrocephalum, a species described from Sumatra, another Indonesian island. The differences of A. bratanense from similar taxa are discussed.

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Research Article Fri, 21 Jan 2022 10:50:54 +0200
Primulina scutellifolia, a new species of Gesneriaceae from southern Vietnam https://phytokeys.pensoft.net/article/77856/ PhytoKeys 187: 15-21

DOI: 10.3897/phytokeys.187.77856

Authors: Ngoc Long Vu, Tran Quoc Trung Nguyen, Gioi Tran, Quoc Dat Nguyen, Hong Truong Luu

Abstract: Primulina scutellifolia is described as a new species from Khanh Hoa Province, southern Central Vietnam. It is distinct in the genus in having scutellate leaves that make it a highly potential ornamental plant. The new species looks like P. annamensis in general shapes, sizes and colours of habit, inflorescence, flower, and leaf but is distinguishable by adaxially glabrous and abaxially strigose leaves with serrate margins, scutellate leaf blade and appressed downwards tomentose petiole, sparsely glandular hairs on apical 1/2 of the gynoecium and trapeziform one-lipped stigma with slightly emarginated apex.

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Research Article Mon, 13 Dec 2021 14:42:54 +0200
Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China III: I. pseudohei, a new species from Yunnan, Southwest China https://phytokeys.pensoft.net/article/63543/ PhytoKeys 186: 43-52

DOI: 10.3897/phytokeys.186.63543

Authors: Jun Wang, Guo-Dong Li, Juan-Juan Yang, Bin Shen, Chun-Xia Pu, Xin-Xin Zhu

Abstract: Isotrema pseudohei, a new species from Yunnan, Southwest China, is described and illustrated. It is morphologically similar to I. hei and I. moupinense, but differs from the former in the colour of flower and throat, the size of throat and the shape of gynostemium lobes, and from the latter in the shape of lamina and gynostemium lobes.

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Research Article Mon, 6 Dec 2021 17:05:53 +0200
Morphological and molecular evidence reveals three new species of Lithocarpus (Fagaceae) from Bidoup-Nui Ba National Park, Vietnam https://phytokeys.pensoft.net/article/69878/ PhytoKeys 186: 73-92

DOI: 10.3897/phytokeys.186.69878

Authors: Nguyen Van Ngoc, Hoang Thi Binh, Ai Nagahama, Shuichiro Tagane, Hironori Toyama, Ayumi Matsuo, Yoshihisa Suyama, Tetsukazu Yahara

Abstract: Three new species, Lithocarpus bidoupensis Ngoc & Tagane, L. congtroiensis Ngoc & Yahara, and L. hongiaoensis Ngoc & Binh are described from Bidoup-Nui Ba National Park, Central Highland of Vietnam. Morphological analyses and Maximum likelihood tree based on genome-wide SNPs support the distinction of those species from the previously known taxa in the region. The three new species are considered to be endemic to the Bidoup-Nui Ba National Park and the preliminary conservation status for each species is evaluated as Critically Endangered.

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Research Article Mon, 6 Dec 2021 12:20:10 +0200
Causonis sessilifolia (Vitaceae), a new species from Thailand https://phytokeys.pensoft.net/article/75570/ PhytoKeys 185: 55-64

DOI: 10.3897/phytokeys.185.75570

Authors: Anna Trias-Blasi, Manop Poopath, Li-Min Lu, Gaurav Parmar

Abstract: A new species, Causonis sessilifolia, from Thailand is described, based on morphological and phylogenetical methods. A full description, conservation assessment, a key, images and phylogenetic tree are provided. Diagnostic characters for this species are sessile leaves that are sometimes opposite and inflorescence insertion interfoliar.

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Research Article Mon, 15 Nov 2021 09:13:28 +0200
Goniothalamus roseipetalus and G. sukhirinensis (Annonaceae): Two new species from Peninsular Thailand https://phytokeys.pensoft.net/article/73210/ PhytoKeys 184: 1-17

DOI: 10.3897/phytokeys.184.73210

Authors: Charan Leeratiwong, Piya Chalermglin, Richard M. K. Saunders

Abstract: Two new Goniothalamus species (Annonaceae), G. roseipetalus sp. nov. and G. sukhirinensis sp. nov., are described from the southern limits of Peninsular Thailand (Narathiwat and Yala Provinces). Both new species resemble G. macrophyllus, G. scortechinii and G. uvarioides. The addition of these two new species brings the total number of Goniothalamus species in Thailand to 27. Separate identification keys are provided for flowering and fruiting specimens of the Thai species.

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Research Article Mon, 25 Oct 2021 09:15:05 +0300
Re-appraisal of Nertera (Rubiaceae) in Taiwan https://phytokeys.pensoft.net/article/70685/ PhytoKeys 182: 83-91

DOI: 10.3897/phytokeys.182.70685

Authors: Wei-Chih Chen, Chih-Chiang Wang, Kun-Cheng Chang

Abstract: A revision of Nertera (Rubiaceae) in Taiwan was carried out by classical taxonomic methods and the presence of two endemic species was confirmed. Only one species, misapplied as N. granadensis, had been reported in the second edition of “Flora of Taiwan”, but there were two additional endemic species in this genus: N. nigricarpa and N. taiwaniana confirmed. Nertera nigricarpa is characterised by the entire leaf, purple-black petals, black fruits and dark-purple seeds with raised striate. Nertera taiwaniana has leaves with undulated margins, yellowish-green petals, red fruits and yellow-white seeds without striate. N. granadensis is excluded from the flora of this Island.

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Research Article Mon, 20 Sep 2021 11:14:11 +0300
Hanguana deflexa (Hanguanaceae), a new forest species from Sarawak, Borneo https://phytokeys.pensoft.net/article/69045/ PhytoKeys 181: 9-19

DOI: 10.3897/phytokeys.181.69045

Authors: Michal Hroneš, Jana Leong-Škorničková, Matti A. Niissalo, Martin Dančák

Abstract: Hanguana deflexa sp. nov. (Hanguanaceae) from Lawas district, Sarawak, Malaysia (northern Borneo) is described and illustrated, bringing the total number of species in Borneo to eight. The new species differs from all other recognized Hanguana species by a combination of flat leaf blade, deflexed infructescences, one-seeded dull red fruits with centrally positioned stigma and globose seed with wedge-shaped ostiole. Revised key for Bornean Hanguana species is presented.

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Research Article Wed, 18 Aug 2021 08:54:53 +0300
An archipelago within an archipelago: A checklist of liverworts and hornworts of Kepulauan Sunda Kecil (Lesser Sunda Islands), Indonesia and Timor-Leste (East Timor) https://phytokeys.pensoft.net/article/65836/ PhytoKeys 180: 1-30

DOI: 10.3897/phytokeys.180.65836

Authors: Ainun Nadhifah, Lars Söderström, Anders Hagborg, Eka Aditya Putri Iskandar, Ida Haerida, Matt von Konrat

Abstract: The first ever liverwort and hornwort checklist is provided for the Kepulauan Sunda Kecil (Lesser Sunda Islands) of Indonesia and Timor-Leste (East Timor). We report 129 accepted taxa, 12 doubtful taxa and three rejected taxa previously reported for the Lesser Sunda Islands. The list is based on over 130 literature references, including monographs, regional studies, and molecular investigations. It is clear that bryophytes from this region have been overlooked historically, and under collected, compared to seed plants, birds, and other organisms, forming a remarkable gap in the flora of Indonesia. Publications dealing with liverworts of Lesser Sunda Islands are few and scattered. We predict that further fieldwork, in addition to collections unveiled from regional herbaria, will uncover a number of new records that remain to be reported, especially considering that regionally widespread species have been recorded elsewhere.

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Checklist Tue, 3 Aug 2021 11:20:11 +0300
Chayamaritia vietnamensis (Gesneriaceae), a new species from Son La Province, northern Vietnam https://phytokeys.pensoft.net/article/63401/ PhytoKeys 177: 43-53

DOI: 10.3897/phytokeys.177.63401

Authors: Zi-Bing Xin, Long-Fei Fu, Stephen Maciejewski, Zhang-Jie Huang, Truong Van Do, Fang Wen

Abstract: Chayamaritia vietnamensis, a new species from Son La Province, northern Vietnam, is described and illustrated. The phylogenetic study revealed that the new species is most closely related to C. banksiae and C. smitinandii. The morphological comparison suggests it as the third new species of Chayamaritia and distinguished from C. banksiae and C. smitinandii by a combination of morphological characters of leaf blades, bracts, calyx and corolla, especially its peltate leaf blades. This species is provisionally assessed as endangered (EN B1ab(iii), B2ab(iii)) using IUCN Categories and Criteria. Information on ecology, phenology and an identification key for the known Chayamaritia species are also provided.

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Research Article Wed, 12 May 2021 14:38:18 +0300
Lycoris wulingensis, a dwarf new species of Amaryllidaceae from Hunan, China https://phytokeys.pensoft.net/article/62741/ PhytoKeys 177: 1-9

DOI: 10.3897/phytokeys.177.62741

Authors: Si-Yu Zhang, Ying Huang, Pei Zhang, Ke-Run Zhu, Yong-Bing Chen, Jian-Wen Shao

Abstract: Lycoris wulingensis S.Y. Zhang, a new species from Hunan Province (central South China), is described and illustrated. This new species is a fertile diploid plant and its karyotype is 2n = 22. It is most similar to L. × haywardii in morphology, but the latter is a hybrid species and distributed in East China and the plant is much larger. Amongst the original species, L. wulingensis is similar to L. radiata, but differs from it in its flowers being rose-red (vs. red) and stamens and tepals are nearly the same length (vs. stamens significantly longer than tepals).

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Research Article Wed, 21 Apr 2021 09:35:02 +0300
Integrating continental mainland and islands in temperate East Asia: liverworts and hornworts of the Korean Peninsula https://phytokeys.pensoft.net/article/56874/ PhytoKeys 176: 131-226

DOI: 10.3897/phytokeys.176.56874

Authors: Seung Se Choi, Vadim Bakalin, Seung Jin Park

Abstract: The liverwort and hornwort flora of the Korean Peninsula possesses some unique traits arising from the geographic position of the Peninsula, where the mainland flora meets insular flora. This flora is still not exhaustively studied, due not only to political reasons, but also because much less attention has been paid than to adjacent lands by hepaticologists. A checklist presented is based on a study of ca. 15,500 specimens collected by the authors and a review of relevant literature. This study provides the checklist of liverworts and hornworts known from Korea and the geographical distribution of each species within the peninsula. The liverworts and hornworts in Korean flora include 346 taxa (326 species, 16 subspecies and four varieties) in 112 genera and 50 families. Since 2007, 75 taxa of liverworts and four taxa of hornworts are reported as new to the Korean Peninsula, with a number of the new records arising following application of new taxonomic concepts that have become apparent over the last few decades. While compiling the checklist, 42 species, previously reported to Korea, are excluded from the Korean liverwort flora.

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Checklist Tue, 20 Apr 2021 10:25:26 +0300
A new species of Viola (Violaceae) from Guangdong Province, China https://phytokeys.pensoft.net/article/65443/ PhytoKeys 176: 67-76

DOI: 10.3897/phytokeys.176.65443

Authors: Yan-Shuang Huang, Ning Kang, Xiang-Jing Zhong, Wen-Bo Liao, Qiang Fan

Abstract: Viola huizhouensis (Violaceae), a new species from Xiangtoushan National Nature Reserve of Guangdong Province in China, is described and illustrated. The new species is most similar to V. guangzhouensis, but it can be easily distinguished by its much stouter rhizome, lack of aerial stem, dense pubescence of the basal pedicel and the whole plant. Our phylogenetic analysis, based on ITS sequences, confirms that the new species belongs to V. sect. Diffusae.

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Research Article Fri, 16 Apr 2021 09:56:22 +0300
Revision of Gymnomitriaceae (Marchantiophyta) in the Korean Peninsula https://phytokeys.pensoft.net/article/62552/ PhytoKeys 176: 77-110

DOI: 10.3897/phytokeys.176.62552

Authors: Vadim Bakalin, Seung Se Choi, Seung Jin Park

Abstract: This paper provides a revision of Gymnomitrion and Marsupella in the Korean Peninsula based on a study of the collections housed in the herbaria of Jeonbuk National University (JNU) and the Botanical Garden-Institute in Vladivostok (VBGI). In total, 12 species were recorded (six in Gymnomitrion and seven in Marsupella), including four taxa whose identity was not confirmed with the available materials and suspected to be recorded wrongly. Each confirmed species is annotated by morphological descriptions based on available Korean material, data on ecology, distribution, specimens examined as well as illustrations.

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Research Article Fri, 16 Apr 2021 09:52:00 +0300
Encyonopsis indonesica sp. nov. (Bacillariophyceae, Cymbellales), a new diatom from the ancient lake Matano (Sulawesi, Indonesia) https://phytokeys.pensoft.net/article/61044/ PhytoKeys 175: 1-11

DOI: 10.3897/phytokeys.175.61044

Authors: Dmitry A. Kapustin, Anton M. Glushchenko, John P. Kociolek, Maxim S. Kulikovskiy

Abstract: A new species, Encyonopsis indonesica, is described from the ancient lake Matano, Sulawesi island, Indonesia. The morphology of this species was studied by means of light and scanning electron microscopy. E. indonesica has a remarkable valve ultrastructure. The valve surface is ornamented with numerous longitudinal siliceous ribs and siliceous verrucae. Valve face delineated from the mantle by a thickened marginal ridge. Raised sterna border the raphe branches. Raphe is distinctly undulate with distal ends hooked strongly to the ventral side. The only similar species to E. indonesica is Amphora dissimilis described from New Caledonia. Comparison of both taxa is given and A. dissimilis is transferred to Encyonopsis. The taxonomic placement of both taxa is evaluated, and the phenomenon of external siliceous ornamentation is discussed.

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Research Article Wed, 17 Mar 2021 12:22:48 +0200
A second species of Pseuduvaria in China: the identity of the enigmatic species Meiogyne kwangtungensis https://phytokeys.pensoft.net/article/61025/ PhytoKeys 172: 1-15

DOI: 10.3897/phytokeys.172.61025

Authors: Qing-Long Wang, Hui Zhang, Yun-Yun Shao, Zhu-Nian Wang, Bine Xue

Abstract: Meiogyne kwangtungensis is a rare species endemic to Hainan, China, known just from two fruiting collections made in the 1930s. Although it was published under the name Meiogyne in 1976, it was suggested that it might be better placed within Pseuduvaria or Mitrephora. For decades, this species was never collected again, thus its true generic affinity remained unresolved due to the lack of flowers. During a field exploration in Hainan, we re-discovered this species and collected a flowering specimen for the first time. The flower immediately confirmed its affinity with Pseuduvaria. Phylogenetic analyses of five chloroplast regions (psbA-trnH, trnL-F, matK, rbcL, and atpB-rbcL; ca. 4.2 kb, 70 accessions) also unambiguously placed Meiogyne kwangtungensis in the Pseuduvaria clade (PP = 1.00, ML BS = 99%). Morphologically, it is most similar to P. multiovulata which is endemic to Myanmar and Thailand, both with often-paired flowers, long pedicels and short peduncles, and often 1–2 monocarps. However, it differs in having smaller flowers with kidney-shaped glands on the inner petals, fewer stamens and carpels, smaller ovoid monocarps with an apicule and fewer seeds. On the basis of the combined molecular phylogenetic and morphological data, we propose a new combination, Pseuduvaria kwangtungensis (P.T.Li) Qing L.Wang & B.Xue. A full description including floral characters and a color plate are provided here for this species. A key to species in the genus Pseuduvaria in China is also provided.

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Research Article Fri, 29 Jan 2021 11:28:19 +0200
Deparia × nanakuraensis K.Hori (Athyriaceae), a new hybrid pteridophyte from Japan https://phytokeys.pensoft.net/article/57837/ PhytoKeys 165: 69-84

DOI: 10.3897/phytokeys.165.57837

Authors: Kiyotaka Hori

Abstract: I describe Deparia × nanakuraensis hyb. nov. and discuss differences in morphological characteristics between parental species D. pterorachis and D. viridifrons with chromosome counting, plastid, and nuclear DNA markers. The new hybrid is endemic to the eastern and northern parts of Japan. Based on the criteria of the International Union for Conservation of Nature and Natural Resources, this new species is here considered Data Deficient. The ploidy level is diploid sterile.

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Short Communication Wed, 28 Oct 2020 11:21:11 +0200
Didymocarpus phuquocensis, a new species of Gesneriaceae from Phu Quoc Island, South-western Vietnam https://phytokeys.pensoft.net/article/47442/ PhytoKeys 159: 35-44

DOI: 10.3897/phytokeys.159.47442

Authors: Thi-Lien Tran, Ngoc-Sam Ly, Minh-Ngoc Tran, Xuan-Truong Nguyen, Ngoc-Giang Cao, Hong-Dung Pham

Abstract: A new species of Gesneriaceae, Didymocarpus phuquocensis, is described and illustrated from Phu Quoc National Park, Kien Giang Province, South-western Vietnam. It is most similar to D. pulcher, D. hookeri and D. punduanus in having 3-verticillate petiolate leaves, morphologically similar calyx, corolla, stamens, pistil and fruit, but differs from all in the glandular-pubescent stems, petioles and leaf blades, 1(–2)-flowered cymes, longer corolla and fruit and longer and densely glandular-puberulent ovary. Data on distribution, ecology, phenology and provisional conservation assessment of the new species are given along with an illustration and a colour plate.

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Research Article Fri, 4 Sep 2020 13:20:02 +0300
Oreocharis jasminina (Gesneriaceae), a new species from mountain tops of Hainan Island, South China https://phytokeys.pensoft.net/article/50246/ PhytoKeys 157: 121-135

DOI: 10.3897/phytokeys.157.50246

Authors: Shao-Jun Ling, Shu-Ping Guan, Fang Wen, Yu-Min Shui, Ming-Xun Ren

Abstract: A new species of Gesneriaceae, Oreocharis jasminina S.J.Ling, F.Wen & M.X. Ren from Hainan Island, south China, is highlighted and described. The new species is distinguished by its actinomorphic corolla, narrow floral tube and ovate anthers hidden in the floral tube. The new species also showed clear geographic and altitudinal isolation from the three currently-recognised Oreocharis species on the Island. Molecular phylogenetic analysis, based on nuclear ITS1/2 and plastid trnL-trnF sequences, supported the delimitation of the new species, which forms a single lineage with all the other Oreocharis species from Hainan Island. The roles of geographic and floral isolation in the evolution of the new species and its affinities are discussed.

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Research Article Wed, 26 Aug 2020 20:00:09 +0300
Oreocharis flavovirens, a new species of Gesneriaceae from Southern Gansu Province, China https://phytokeys.pensoft.net/article/31732/ PhytoKeys 157: 101-112

DOI: 10.3897/phytokeys.157.31732

Authors: Wei-Hua Qin, Dong-Dong Ding, Zhong-Lin Li, Yun-Feng Gao, Shu Li, Xin Hong

Abstract: Oreocharis flavovirens is a new species of Gesneriaceae from Gansu, China and is described and illustrated here. It is morphologically similar to O. glandulosa, O. humilis and O. farreri, but those congeners of this new taxon can be distinguished by several salient characters. A description of O. flavovirens, together with illustrations and photos, are presented.

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Research Article Wed, 26 Aug 2020 20:00:07 +0300
Discovery of the first succulent bamboo (Poaceae, Bambusoideae) in a new genus from Laos’ karst areas, with a unique adaptation to seasonal drought https://phytokeys.pensoft.net/article/51636/ PhytoKeys 156: 125-137

DOI: 10.3897/phytokeys.156.51636

Authors: Thomas Haevermans, Dulce Mantuano, Meng-Yuan Zhou, Vichith Lamxay, Agathe Haevermans, Patrick Blanc, De-Zhu Li

Abstract: Lush jungle flagship species, woody bamboos (Poaceae–Bambusoideae) are famed for their synchronous flowering as well as the extensive “bamboo forests” some species can form in tropical or temperate environments. In portions of their natural distribution, Bambusoideae members developed various adaptations to seasonality in environmental parameters, such as frost or seasonal drought. A new taxon, Laobambos calcareus, described here, is extremely novel in showing the first documented case of succulence in bamboos, with its ability to seasonally vary the volume of its stem depending on the quantity of water stored. Anatomical studies presented in this paper document this specificity at the cellular level. Though no flowers or fruits are known yet, unique morphological characteristics along with an investigation of its phylogenetic affinities using molecular data show that this new taxon should belong to a new genus herein described.

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Research Article Fri, 21 Aug 2020 15:06:38 +0300
Lectotypification of the name Stereodon nemoralis Mitt. (Plagiotheciaceae), a basionym of Plagiothecium nemorale (Mitt.) A. Jaeger https://phytokeys.pensoft.net/article/51469/ PhytoKeys 155: 141-153

DOI: 10.3897/phytokeys.155.51469

Authors: Grzegorz J. Wolski, Anna Faltyn-Parzymska, Jarosław Proćków

Abstract: In 1859, William Mitten described Stereodon nemoralis (≡ Plagiothecium nemorale) based on the gathering of Sir J.D. Hooker from India. However, the protologue did not indicate any specific specimen or illustration. For the past 50 years, the original material (NY 913349) deposited at the NY Herbarium has been considered as the holotype. However, this assumption has since been found to be incorrect, because in the Herbarium of The Natural History Museum exists other original material of this species (BM 1030713), collected by Hooker. In addition, the specimen from NY Herbarium is in poor condition and its most important diagnostic characters are not visible. In contrast, the material from BM Herbarium is in very good condition, and therefore it is herein designated as the lectotype. Also, the paper describes the resolution of this type, a process complicated by changes that had occurred in the provisions of subsequent botanical Codes.

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Research Article Fri, 7 Aug 2020 11:51:35 +0300
Several new records, synonyms, and hybrid-origin of Chinese begonias https://phytokeys.pensoft.net/article/50805/ PhytoKeys 153: 13-35

DOI: 10.3897/phytokeys.153.50805

Authors: Dai-Ke Tian, Yan Xiao, Yan-Ci Li, Ke-Jian Yan

Abstract: Begonia is a mega-genus with about 2500 species by most estimates, with China having over 210 accepted species. After field surveys, literature review and examination of herbarium specimens, some new taxa, new records, synonyms and the hybrid-origin of some taxa have been confirmed. Here, we report that Begonia dioica Buch.-Ham. ex D.Don and B. flagellaris Hara, both from Xizang (Tibet) are new to China; Begonia lipingensis Hance, B. muliensis T.T.Yu and B. sizemoreae Kiew are synonyms of B. circumlobata Hance, B. taliensis Gagnepain and B. longiciliata C.Y.Wu, respectively; and Begonia × lancangensis S.H.Huang and B. × malipoensis S.H.Huang & Y.M.Shui are natural hybrids.

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Research Article Thu, 16 Jul 2020 10:33:38 +0300
Camellia puhoatensis (Sect. Archecamellia – Theaceae), a new species from Vietnam https://phytokeys.pensoft.net/article/49388/ PhytoKeys 153: 1-11

DOI: 10.3897/phytokeys.153.49388

Authors: Danh-Hùng Nguyễn, Văn-Dũng Lương, Thị-Hương Lê, Quốc-Thành Trần, Ngọc-Đài Đỗ, Ngọc-Sâm Lý

Abstract: A new species of Theaceae, Camellia puhoatensis N.S. Lý, V.D. Luong, T.H. Le, D.H. Nguyen & N.D. Do, sp. nov., is described and illustrated from Nghe An Province, North Central Coastal Region, Vietnam. It is most similar to C. chrysanthoides, C. flavida and C. petelotii within sect. Archecamellia in shape and colouration of leaf, petal, ovary and glabrous stamen, but differs by its young puberulous shoot, mature leaf sparsely puberulous abaxially and leaf base rounded or broadly obtuse, petiole and pedicel puberulous, tepals 12–13, ovary and style pubescent. The comparison between the new species and C. velutina and C. dormoyana is presented. Data on distribution, ecology, phenology, use and provisional conservation assessment of the new species are given along with an illustration and a colour plate.

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Research Article Thu, 16 Jul 2020 10:28:02 +0300
A review of Calypogeia (Marchantiophyta) in the eastern Sino-Himalaya and Meta-Himalaya based mostly on types https://phytokeys.pensoft.net/article/52920/ PhytoKeys 153: 111-154

DOI: 10.3897/phytokeys.153.52920

Authors: Vadim A. Bakalin, Ksenia G. Klimova, Van Sinh Nguyen

Abstract: The eastern part of the southern macroslope of the Himalayan Range, Hengduan Mountains and the complex of smaller ranges from Hengduan southward to northern Indochina is one of the taxonomic hotspots of Calypogeia in Asia and the world. Two main circumstances hamper the understanding of taxonomic diversity of the genus in this area: the absence of recent and detailed descriptions and identification keys and the necessity of studying fresh material with surviving oil bodies in leaf cells. This study resulted in 1) eleven species confirmed for this vast land, 2) seven more taxa recorded but likely based on identification mistakes and 3) fourteen more taxa that are not yet recorded but may be expected in the area. All these taxa are discussed, and most of them are illustrated and described based on the types; an identification key is provided. The occurrence of North Holarctic taxa is hardly probable in the Sino-Himalaya, whereas new records of taxa known from the southern half of the Japanese Archipelago, Taiwan and southeastern mainland China are possible.

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Research Article Thu, 16 Jul 2020 10:23:25 +0300
Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China: II. I. brevilimbum (Aristolochiaceae), a new species from Guizhou, China https://phytokeys.pensoft.net/article/51760/ PhytoKeys 152: 15-25

DOI: 10.3897/phytokeys.152.51760

Authors: Jun Wang, Ji-Dong Ya, Cheng Liu, Guang Liu, Feng Cao, Jin-Shuang Ma, Xin-Xin Zhu

Abstract: A new species of Isotrema was recently discovered from Guizhou, China and is here named as I. brevilimbum. It is most similar to I. ovatifolium and I. wardianum, but differs in the morphology of leaves and flowers. A detailed description for the new species, along with line drawings, photographs, as well as morphological comparisons with similar species, are provided. In addition, the distribution of I. wardianum in China is here confirmed.

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Research Article Fri, 3 Jul 2020 08:23:07 +0300
Loxostigma puhoatense (Gesneriaceae), a new species from North Central Vietnam https://phytokeys.pensoft.net/article/49473/ PhytoKeys 151: 49-57

DOI: 10.3897/phytokeys.151.49473

Authors: Ngọc-Sâm Lý, Danh-Hùng Nguyễn, Thị-Hương Lê, Minh-Hợi Trần, Ngọc-Đài Đỗ, Bá-Vương Trương, Stephen Maciejewski

Abstract: Loxostigma puhoatense N.D. Do et al., sp. nov., a new species of Gesneriaceae, is described and illustrated from Pu Hoat Nature Reserve, Nghe An Province, Vietnam. This species is morphologically similar to L. dongxingensis and L. damingshanensis in the plant habit, indumentum system of vegetative and reproductive characters, shape of leaf blades, calyx, pistil but differs from the latter two by the abaxially reddish-purple leaf blade with pubescent along veins, lateral veins 11–19, shorter white to pale yellowish-white corolla (3.7–3.8 cm long) with purple-spotted and glabrous inside, longer abaxial stamens in 2–2.1 cm, shorter and densely glandular-puberulent ovary in 1–1.2 cm, and sparsely glandular-puberulent style. Data on distribution, ecology, phenology, and vernacular of the new species are provided.

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Research Article Fri, 12 Jun 2020 14:30:41 +0300
Actinostachys minuta, a new species of grass fern from Mindanao, Philippines https://phytokeys.pensoft.net/article/53100/ PhytoKeys 151: 59-66

DOI: 10.3897/phytokeys.151.53100

Authors: Victor B. Amoroso, Fulgent P. Coritico, Peter W. Fritsch

Abstract: Actinostachys minuta Amoroso & Coritico (Schizaeaceae), from Mindanao, Philippines, is described herein as a new species. This species is distinguished from all other species of Actinostachys (grass ferns) by its notably short and narrow fronds, distinct triangular stipe, and bifid apex of the sorophore lamina with profuse white long hairs. This species is distinct from the other known Philippine species of Actinostachys by its diminutive epiphytic habit and a habitat restricted to the trunks of the tree fern Sphaeropteris polypoda (Baker) R.M.Tryon. A taxonomic key to the species of Philippine Schizaeaceae that incorporates the new species is provided.

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Research Article Fri, 12 Jun 2020 11:51:19 +0300
Oxytropis shennongjiaensis (Fabaceae), a new species from Hubei, Central China https://phytokeys.pensoft.net/article/49533/ PhytoKeys 149: 117-128

DOI: 10.3897/phytokeys.149.49533

Authors: Jun-Tong Chen, Dai-Gui Zhang, Zhen-Yu Lv, Xian-Han Huang, Peng-Ju Liu, Jia-Ning Yang, Jing-Yuan Yang, Komiljon Tojibaev, Tao Deng, Hang Sun

Abstract: Here we describe Oxytropis shennongjiaensis, a new species of Fabaceae from Central China (Hubei Province). Morphologically, O. shennongjiaensis is closely similar to O. sitaipaiensis, O. melanocalyx and O. kansuensis, but differs in stem characters, with less conspicuous internodes; persistent herbaceous stipules; pale yellow to white corolla; and stipitate legumes, 3–5 mm with a long beak. Phylogenetic analysis, based on the internal transcribed spacers (ITS) and two chloroplast markers (trnL–F and psbA–trnH), also identified O. shennongjiaensis as a new species, which is consistent with our morphological analyses. Considering the morphological data and phylogenetic data presented here, we believe that this evidence satisfies the required diagnostic criteria to identify O. shennongjiaensis as a new species.

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Research Article Thu, 4 Jun 2020 09:55:15 +0300
A new species of Argyreia (Convolvulaceae) from Thailand https://phytokeys.pensoft.net/article/50379/ PhytoKeys 149: 109-115

DOI: 10.3897/phytokeys.149.50379

Authors: Paweena Traiperm, Somran Suddee

Abstract: Argyreia pseudosolanum Traiperm & Suddee, sp. nov. from the NE region of Thailand is described and illustrated. The new species is remarkable in having a very distinctive corolla shape similar to Solanum, and staminal filament bases glabrous or nearly glabrous with a few multicellular, uniseriate hairs at the attachment point on the corolla tube. Detailed descriptions, illustrations, a summary of the ecology and an IUCN conservation status are provided.

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Research Article Thu, 4 Jun 2020 08:40:01 +0300
Athyrium bipinnatum K.Hori (Athyriaceae), a new cornopteroid fern from Japan https://phytokeys.pensoft.net/article/51589/ PhytoKeys 148: 93-104

DOI: 10.3897/phytokeys.148.51589

Authors: Kiyotaka Hori

Abstract: I describe Athyrium bipinnatum sp. nov. and discuss morphological differences between closely related species. The new species is endemic to Japan, occurring on the islands of Honshu, Kyushu, and Shikoku. Based on the criteria of the International union for conservation of nature and natural resources, this new species is here considered endangered.

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Research Article Tue, 26 May 2020 15:04:08 +0300
Sedum formosanum subsp. miyakojimense (Crassulaceae), a new subspecies from Miyako-jima Island of the Ryukyu Islands, Japan https://phytokeys.pensoft.net/article/48957/ PhytoKeys 148: 51-70

DOI: 10.3897/phytokeys.148.48957

Authors: Takuro Ito, Chih-Chieh Yu, Masatsugu Yokota, Goro Kokubugata

Abstract: We re-examined the taxonomic status of plants treated as Sedum formosanum (Crassulaceae) from Miyako-jima Island of the Ryukyu Islands, Japan, using morphological comparison and molecular phylogenetic analyses with related species. In morphology, plants from Miyako-jima Island bore a close resemblance to the other plants of S. formosanum, but differed in being perennial, polycarpic, and having lateral axillary branches. Molecular analyses based on ITS of nrDNA and six regions of cpDNA sequencing indicated that the Miyako-jima plants formed a distinct subclade. This subclade was part of a polytomy with three other subclades comprising nine taxa endemic to Taiwan and S. formosanum from other areas, including the type locality. Therefore, we propose and describe the Miyako-jima plants as a new subspecies, Sedum formosanum subsp. miyakojimense.

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Research Article Tue, 26 May 2020 11:06:55 +0300
Gymnosiphon syceorosensis (Burmanniaceae), the second new species for the Philippines https://phytokeys.pensoft.net/article/48321/ PhytoKeys 146: 71-87

DOI: 10.3897/phytokeys.146.48321

Authors: Daniel L. Nickrent

Abstract: A new holomycoheterotrophic member of Burmanniaceae, Gymnosiphon syceorosensis, is described from Mt. Hamiguitan located on the island of Mindanao, Philippines. This species differs from the recently named G. philippinensis from Cebu in a number of quantitative and qualitative characters. Phenetic (neighbor-joining) and phylogenetic (maximum parsimony) analyses of characters from Asian and Australian Gymnosiphon species were conducted and diagnostic taxonomic features were discussed. This new species appears to be most closely related to G. affinis J.J. Sm. from New Guinea but differs in a number of floral features including inner perianth lobe shape, stamen position in floral tube, and anther connective shape.

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Research Article Fri, 8 May 2020 11:02:17 +0300
Two new species of Ardisia subgenus Tetrardisia (Primulaceae-Myrsinoideae) from Borneo https://phytokeys.pensoft.net/article/48573/ PhytoKeys 145: 139-148

DOI: 10.3897/phytokeys.145.48573

Authors: Avelinah Julius, Tadashi Kajita, Timothy M. A. Utteridge

Abstract: Ardisia argentiana and A. nagaensis from subgenus Tetrardisia are herein described and illustrated as new species. They are endemic to Borneo and the Indonesian province of Central Kalimantan and to the Malaysian state of Sarawak, respectively. Ardisia argentiana is unique in its linear-oblong leaves, with a long, acuminate-caudate apex, and finely serrulate margins, while A. nagaensis can be easily recognized by its elliptic-lanceolate leaves.

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Research Article Fri, 10 Apr 2020 11:14:18 +0300
Hanceola suffruticosa (Lamiaceae, Nepetoideae), a new species from the Sino-Vietnamese border https://phytokeys.pensoft.net/article/49995/ PhytoKeys 145: 131-138

DOI: 10.3897/phytokeys.145.49995

Authors: Ya-Ping Chen, Alan J. Paton, Chun-Lei Xiang

Abstract: Hanceola is a genus of eight herbaceous species previously thought to be endemic to southern China. However, H. suffruticosa, a new species described here from China and Vietnam, differs from all other species of Hanceola by its subshrubby habit. It is also distinct in its shallowly bicrenate laminae and densely purplish glandular puberulent inflorescences. The morphological description, illustrations, and distribution of the new species are presented. A key to all species of Hanceola is also provided.

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Research Article Fri, 10 Apr 2020 10:30:39 +0300
Taxonomic notes on Scutellaria taipeiensis (Lamiaceae) from morphological and molecular data https://phytokeys.pensoft.net/article/48578/ PhytoKeys 140: 33-45

DOI: 10.3897/phytokeys.140.48578

Authors: Chien-Ti Chao, Bing-Hong Huang, Jui-Tse Chang, Pei-Chun Liao

Abstract: The genus Scutellaria comprises eight species distributed from 50 to 2000 m in Taiwan. Amongst them, S. barbata and S. taipeiensis are very similar on the basis of morphological and plastid DNA sequence information. Therefore, a comprehensive study of the taxonomic status of S. taipeiensis is necessary. We reviewed the herbarium sheets, related literature and protologues and compared morphologies of these two species, as well as their phylogenetic relationships. All evidence, including the diagnostic characters between S. taipeiensis and S. barbata, suggest that they belonged to a single species rather than two. As a result, S. taipeiensis is treated as a synonym of S. barbata.

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Research Article Mon, 24 Feb 2020 10:50:05 +0200
Taxonomic studies on Amomum Roxburgh s.l. (Zingiberaceae) in Myanmar II: one new species and five new records for the flora of Myanmar https://phytokeys.pensoft.net/article/38736/ PhytoKeys 138: 139-153

DOI: 10.3897/phytokeys.138.38736

Authors: Hong-Bo Ding, Bin Yang, Mya Bhone Maw, Pyae Pyae Win, Yun-Hong Tan

Abstract: In the course of a study of Amomum s.l. (Zingiberaceae) in Myanmar, Amomum schistocalyx Y.H. Tan & H.B. Ding, from Htamanti Wildlife Sanctuary, Sangaing Region of Northern Myanmar is described and illustrated as new to science here. Five taxa: A. yingjiangense S.Q. Tong & Y.M. Xia, A. carnosum V.P. Thomas & M. Sabu, A. tibeticum (T.L. Wu & S.J. Chen) X.E. Ye, L. Bai & N.H. Xia, Lanxangia scarlatina (H.T. Tsai & P.S. Chen) M.F. Newman & Škorničk, and Meistera yunnanensis (S.Q. Tong) Škorničk. & M.F. Newman, are newly recorded from Myanmar. The photographic illustrations, the distributions, and voucher specimens for each species are provided.

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Research Article Fri, 10 Jan 2020 14:29:10 +0200
Two new species of Alseodaphnopsis (Lauraceae) from southwestern China and northern Myanmar: evidence from morphological and molecular analyses https://phytokeys.pensoft.net/article/38569/ PhytoKeys 138: 27-39

DOI: 10.3897/phytokeys.138.38569

Authors: Lang Li, Yun-Hong Tan, Hong-Hu Meng, Hui Ma, Jie Li

Abstract: Alseodaphnopsis maguanensis and A. putaoensis, two new species of Alseodaphnopsis (Lauraceae) from southwestern China (Yunnan Province) and northern Myanmar (Kachin State), are here described and illustrated based on both morphological and molecular evidence. They are morphologically similar to Alseodaphnopsis rugosa and phylogenetically closely related to A. rugosa and A. hainanensis respectively. Their preliminary conservation status is also estimated according to the IUCN Red List Categories and Criteria.

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Research Article Fri, 10 Jan 2020 14:29:04 +0200
A new species and two new records of Goniothalamus (Annonaceae) from Lao PDR https://phytokeys.pensoft.net/article/38995/ PhytoKeys 138: 17-25

DOI: 10.3897/phytokeys.138.38995

Authors: Bin Yang, Ren-Bin Zhu, Hong-Bo Ding, Somsanith Bouamanivong, Yun-Hong Tan

Abstract: Goniothalamus saccopetaloides Y.H. Tan & Bin Yang, a new species is described and illustrated from Laos. This species shows morphological similarities to G. yunnanensis W.T. Wang, but it differs from the latter by having almost fleshy, involute and saccate outer petals, subglobose monocarps, and single seeded monocarps. Goniothalamus cheliensis, and G. calvicarpus are new records for the Flora of Lao PDR. A key to Goniothalamus species indigenous to Laos is provided here.

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Research Article Fri, 10 Jan 2020 14:29:03 +0200
A new species and two new combinations of Monolophus (Zingiberaceae) from Indo-Burma https://phytokeys.pensoft.net/article/39217/ PhytoKeys 138: 155-162

DOI: 10.3897/phytokeys.138.39217

Authors: Hong-Bo Ding, Bin Yang, Mya Bhone Maw, Pyae Pyae Win, Yun-Hong Tan

Abstract: Monolophus odontochilus Y.H.Tan & H.B.Ding, a new species from Northern Myanmar, is described and illustrated. The new species is morphologically similar to M. linearis, but differs by having elliptic to oblong leaves (vs. linear-lanceolate to lanceolate), bilobed ligules (vs. entire), purely white corolla (vs. pinkish white), semi-orbicular crenate labellum (vs. trilobed). In addition, a diagnostic key to the new species of Monolophus and its closely related non-yellow flowered species is provided. New combinations are proposed here for Caulokaempferia phokhamii Picheans. & Douangde. and C. wongsuwaniae Picheans. & Douangde. from Laos.

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Research Article Fri, 10 Jan 2020 13:56:22 +0200
An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records https://phytokeys.pensoft.net/article/46718/ PhytoKeys 138: 187-201

DOI: 10.3897/phytokeys.138.46718

Authors: Hong-Bo Ding, Mya Bhone Maw, Bin Yang, Somsanith Bouamanivong, Yun-Hong Tan

Abstract: Two new species of Begonia L. (Begoniaceae), B. laotica (sect. Parvibegonia) and B. hypoleuca (sect. Reichenheimia), from north Laos are described and illustrated. Begonia augustinei, B. dryadis, B. lancangensis, B. sizemoreae and B. sillentensis subsp. mengyangensis were newly recorded taxa in Laos. Furthermore, an updated checklist of Begonia of Laos is also compiled.

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Research Article Fri, 10 Jan 2020 11:17:31 +0200
Taxonomic studies on Begonia (Begoniaceae) in Myanmar I: three new species and supplementary description of Begonia rheophytica from Northern Myanmar https://phytokeys.pensoft.net/article/38721/ PhytoKeys 138: 203-217

DOI: 10.3897/phytokeys.138.38721

Authors: Mya Bhone Maw, Hong-Bo Ding, Bin Yang, Pyae Pyae Win, Yun-Hong Tan

Abstract: Three new species of Begonia (B. chenii, B. putaoensis and B. crassitepala) belonging to Begonia section Platycentrum and a supplementary description of B. rheophytica with a detailed description of female flowers from Putao, Kachin State, Northern Myanmar, are described and illustrated. All the new species are endemic to Northern Myanmar and can be easily distinguished from other species among the section Platycentrum. A detailed description, photographs, habitat, distribution and a comparison with the most related allied species for all new species are provided.

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Research Article Fri, 10 Jan 2020 10:38:57 +0200
Two new species of Phyllanthus (Phyllanthaceae) from Thailand https://phytokeys.pensoft.net/article/47625/ PhytoKeys 136: 35-44

DOI: 10.3897/phytokeys.136.47625

Authors: Pimwadee Pornpongrungrueng, Pranom Chantaranothai, John A.N. Parnell, Trevor R. Hodkinson

Abstract: Two Phyllanthus species are newly described from a limestone mountain in the north of Thailand. The first species, P. huamotensis Pornp., Chantar. & J.Parn., sp. nov., is one of the most distinct Phyllanthus species easily distinguished by its reddish branchlets and stem, conspicuous reddish venation, especially on the lower leaf surface, red sepals with long fimbriate margin and red capsule with papillose-puberulous surface. The second species, P. chantaranothaii Pornp., J.Parn. & Hodk., sp. nov., is similar to P. pulcher Wall. ex Müll.Arg., but it is distinguished by its puberulous upper leaf surface and pistillate flowers which have red, narrowly lanceolate sepals with a white, long fimbriate margin, puberulous outer side as well as puberulous pedicel.

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Research Article Wed, 11 Dec 2019 14:08:15 +0200
A new species of Chrysosplenium (Saxifragaceae) from Northeastern China https://phytokeys.pensoft.net/article/39036/ PhytoKeys 135: 39-47

DOI: 10.3897/phytokeys.135.39036

Authors: Yong-In Kim, Jae-Seo Shin, Sangwoo Lee, Jia-Hui Chen, Sangho Choi, Jin Hee Park, Young-Dong Kim

Abstract: This study describes and illustrates Chrysosplenium macrospermum Y.I.Kim & Y.D.Kim, a new plant species from Changbaishan Mt. (Baekdusan Mt.) in northeastern China. The species is most similar to Chrysosplenium valdepilosum in the series Pilosa but is readily distinguishable by short arching sterile branches, multiple (up to 3) flowering stems, and smooth surfaced seeds (without tubercles), which are ca. 30–50% larger than those of other members in the series.

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Research Article Mon, 25 Nov 2019 10:45:52 +0200
New taxa of Rhododendron tschonoskii alliance (Ericaceae) from East Asia https://phytokeys.pensoft.net/article/38216/ PhytoKeys 134: 97-114

DOI: 10.3897/phytokeys.134.38216

Authors: Watanabe Yoichi, Tadashi Minamitani, Sang-Hun Oh, Atsushi J. Nagano, Harue Abe, Tomohisa Yukawa

Abstract: Three new taxa, Rhododendron sohayakiense Y.Watan. & T.Yukawa (Ericaceae), and its two varieties, var. kiusianum Y.Watan., T.Yukawa & T.Minamitani and var. koreanum Y.Watan. & T.Yukawa are described and illustrated from Japan and South Korea. They can be distinguished from each other and from the other members of the R. tschonoskii alliance, i.e. R. tschonoskii, R. tetramerum, R. trinerve and R. tsusiophyllum, through their combination of leaf size, leaf morphologies including lateral nerves on abaxial leaf surface, corolla morphologies including number of corolla lobes, style length and anther form. Phylogenetic inferences based on chloroplast DNA and genome-wide sequences revealed that each of the three new taxa is monophyletic and they further form a clade. Distributions of the three taxa are also clearly separated from each other and also from the other members of the R. tschonoskii alliance.

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Research Article Wed, 23 Oct 2019 10:48:37 +0300
Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China: I. I. cangshanense, a new species from Yunnan https://phytokeys.pensoft.net/article/37243/ PhytoKeys 134: 115-124

DOI: 10.3897/phytokeys.134.37243

Authors: Xin Xin Zhu, Hai Lei Zheng, Jun Wang, Yong Qian Gao, Jin Shuang Ma

Abstract: Isotrema cangshanense X.X.Zhu, H.L.Zheng & J.S.Ma, a new species from western Yunnan, China, is described and illustrated here. It is similar to I. utriforme, I. forrestianum, I. cucurbitoides and I. obliquum The major differences between them are outlined and discussed. A detailed description, along with line drawings, photographs, habitat and distribution, as well as a comparison to morphologically similar species, is also provided. Meanwhile, the new taxon is assessed as Vulnerable (VU D2), according to the IUCN Red List criteria.

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Research Article Wed, 23 Oct 2019 10:06:29 +0300
Bolbitis lianhuachihensis (Dryopteridaceae), a new species from Taiwan https://phytokeys.pensoft.net/article/36548/ PhytoKeys 131: 69-81

DOI: 10.3897/phytokeys.131.36548

Authors: Yi-Shan Chao, Yu-Fang Huang, Shi-Yong Dong, Yao-Moan Huang, Ho-Yih Liu

Abstract: A new species of Bolbitis, B. lianhuachihensis sp. nov., was found in central Taiwan. It most resembles B. virens var. compacta and B. hainanensis. A phylogenetic tree of Taiwanese and other Asian species of Bolbitis species supports the recognition of the new species. Morphologically, the combination of anastomosing venation and fewer sterile pinnae are critical characters to discriminate B. lianhuachihensis from other Taiwanese Bolbitis species. Bolbitis lianhuachihensis can be further distinguished from B. virens var. compacta and B. hainanensis by having lanceolate sterile pinnae and absent or fewer free veinlets in small areoles of sterile pinnae. The morphological descriptions, illustration, ecology and distribution of the new species are presented. A key to all Taiwanese Bolbitis is also provided.

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Research Article Thu, 5 Sep 2019 11:06:49 +0300
Mosses of Gunung Senyum Recreational Forest, a tropical limestone forest in Pahang, Peninsular Malaysia https://phytokeys.pensoft.net/article/33860/ PhytoKeys 128: 57-72

DOI: 10.3897/phytokeys.128.33860

Authors: N. Norhazrina, N. Syazwana, M. Aisyah, H. Aznani, H. Maideen, M.S. Nizam

Abstract: Gunung Senyum Recreational Forest harbours 59 species, two subspecies and five varieties of mosses in 32 genera and 16 families that had been identified from a total of 589 specimens collected from the area. These figures represent 11.8% out of the 558 taxa, 20.2% out of the 158 genera and 34.7% out of the 46 families of mosses reported for Peninsular Malaysia. The total also represents 14.9% of the 442 taxa, 24.0% of the 133 genera and 40.0% of the 40 families of mosses recorded in Pahang. The largest family of mosses found in this limestone forest is Calymperaceae followed by Fissidentaceae. There are two new records for Pahang, Calymperes pallidum Mitt. and Taxithelium binsteadii Broth. & Dixon. The analysis of species similarities of mosses found in the study area with some other selected areas showed that Gunung Senyum Recreational Forest had a high percentage of species similarity with Perlis State Park at Wang Kelian, another limestone forest, at 38%. Corticol is the main habitat utilised by mosses in Gunung Senyum Recreational Forest with 47 taxa, followed by the lignicol and calcicol each with 35 and 26 taxa, respectively.

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Research Article Thu, 25 Jul 2019 13:36:40 +0300
A new variety of Didymocarpus (Gesneriaceae) from Guangdong, China https://phytokeys.pensoft.net/article/35446/ PhytoKeys 128: 33-38

DOI: 10.3897/phytokeys.128.35446

Authors: Wen-Jing Xu, Wei-Hua Qin, Zi-Qi Wang, Zhong-Lin Li, Long-Fei Fu, Xin Hong

Abstract: A new variety of Didymocarpus, D. heucherifolius var. gamosepalus from Guangdong, China, is described and illustrated with photographs. It closely resembles the more widespread D. heucherifolius within a number of morphological characters. However, it can be easily distinguished from the latter according to the new taxon: calyx base connate, 5-lobed from middle to above middle, larger flowers (up to 5 cm long) and glabrous corolla.

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Research Article Tue, 23 Jul 2019 11:42:56 +0300
Recircumscription of Bredia and resurrection of Tashiroea (Sonerileae, Melastomataceae) with description of a new species T. villosa https://phytokeys.pensoft.net/article/36608/ PhytoKeys 127: 121-150

DOI: 10.3897/phytokeys.127.36608

Authors: Qiu-Jie Zhou, Jin-Hong Dai, Che-Wei Lin, Tetsuo Denda, Ren-Chao Zhou, Ying Liu

Abstract: Bredia (Melastomataceae) is an Asian genus that extends from central and southern mainland China to Taiwan and the Ryukyu islands. Molecular phylogenetic analyses reveal that the type of Bredia is nested in a clade of 20 species, while Tashiroea, a genus previously synonymized in Bredia, falls in another distantly related clade of 10 species. Our morphological survey shows that the two clades can be distinguished by several diagnostic features including leaf indumentum, texture, leaf surface sculpture under SEM, presence/absence of yellowish uniseriate trichomes, and capsule morphology. Based on molecular and morphological evidence, Bredia is recircumscribed and Tashiroea is resurrected. Description and a list of species are provided for the two genera with the description of a new species, T. villosa.

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Research Article Fri, 19 Jul 2019 10:07:51 +0300
Origin of the Diplazium hachijoense complex (Athyriaceae) https://phytokeys.pensoft.net/article/35242/ PhytoKeys 124: 57-76

DOI: 10.3897/phytokeys.124.35242

Authors: Kiyotaka Hori, Noriaki Murakami

Abstract: We analyzed the phylogeny of the Diplazium hachijoense complex using plastid trnL-F and low-copy nuclear marker AK1 DNA sequences. Based on allele constitution, triploid apogamous species of the D. hachijoense complex appeared to have originated from the hybridization of triploid apogamous species and diploid sexual species by recurrent hybridization events. These results suggested that triploid apogamous ferns can achieve hybridization with diploid sexual species by producing diploid spores with irregular meiosis in sporogenesis. Furthermore, the present study predicted the involvement of several unknown species associated with hybridization. More sampling of Callipteris species from China and adjacent areas is required to determine the relationships among unknown species and the D. hachijoense complex.

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Research Article Tue, 18 Jun 2019 17:29:10 +0300
Justicia thailandica, a new species of Acanthaceae from Thailand https://phytokeys.pensoft.net/article/33745/ PhytoKeys 124: 11-22

DOI: 10.3897/phytokeys.124.33745

Authors: Yi Tong, Yunfei Deng

Abstract: A new species of Justicia (Acanthaceae), J. thailandica, is described and illustrated from Thailand. The new species belongs to Justicia sect. Harnieria and is similar to J. quadrifaria and J. championii, but differs on account of the obviously densely white indumentum in the inflorescence bracts and calyx, ovate leaf blades with margin usually entire, spathulate inflorescence bracts and length ratio of calyx to mature capsule. It is assessed to be “Near threatened” (NE) according to IUCN Red List Category and Criteria. Pollen and seed morphology characters are also reported. Species of Justicia sect. Harnieria in Thailand are discussed and a key to the three recognized species is presented.

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Research Article Thu, 6 Jun 2019 10:52:14 +0300
Mitrephora monocarpa (Annonaceae): a new species from Surat Thani Province, Peninsular Thailand https://phytokeys.pensoft.net/article/34271/ PhytoKeys 121: 73-80

DOI: 10.3897/phytokeys.121.34271

Authors: Richard M.K. Saunders, Piya Chalermglin

Abstract: A new species, Mitrephora monocarpa R.M.K.Saunders & Chalermglin, sp. nov. (Annonaceae), is described from Surat Thani Province in Peninsular Thailand. It resembles two other species, M. alba Ridl. and M. keithii Ridl., with which it is broadly sympatric, but can be distinguished by its solitary flowers (not borne in thyrsoid inflorescences as in most other Mitrephora species), single carpel per flower (and hence single monocarp per fruit) and the lack of a monocarp stipe. A key to the nine Mitrephora species in Thailand is provided.

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Research Article Tue, 7 May 2019 11:32:23 +0300
Taxonomic studies of pteridophytes of Ambon and Seram (Moluccas) collected on Indonesian-Japanese botanical expeditions 1983–1986. XIII. Hymenophyllaceae https://phytokeys.pensoft.net/article/33565/ PhytoKeys 119: 107-115

DOI: 10.3897/phytokeys.119.33565

Authors: Kunio Iwatsuki, Atsushi Ebihara, Masahiro Kato

Abstract: Identifications are given for 713 specimens of Hymenophyllaceae collected on Ambon and Seram islands, the Moluccas, Indonesia, during 1983–86. The collection is composed of forty-seven species and one variety belonging to seven genera. The dataset is deposited in GBIF and available at https://www.gbif.jp/ipt/resource?r=seram_hymen.

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Data Paper Tue, 2 Apr 2019 11:03:45 +0300
Sorbus lushanensis, a new species of Rosaceae from China https://phytokeys.pensoft.net/article/32148/ PhytoKeys 119: 97-105

DOI: 10.3897/phytokeys.119.32148

Authors: Jing Qiu, Yang Zhao, Qi Qi, Xin Chen

Abstract: Sorbus lushanensis Xin Chen & Jing Qiu, sp. n. (Rosaceae), a new simple-leaved species belonging to Sorbus subg. Aria sect. Alnifoliae, is described from Anhui and Jiangxi provinces in China. Illustrations, photographs of wild plants and a distribution map are presented. The new species is morphologically similar to S. folgneri, but can be distinguished easily by its abaxially greenish-grey tomentose leaves, scale-like stipules and glabrous styles.

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Research Article Tue, 26 Mar 2019 11:37:35 +0200
Microchirita hairulii (Gesneriaceae), a new species from Perlis, Peninsular Malaysia https://phytokeys.pensoft.net/article/32186/ PhytoKeys 118: 65-73

DOI: 10.3897/phytokeys.118.32186

Authors: Rafidah Abdul Rahman

Abstract: A new species, Microchirita hairulii Rafidah (Gesneriaceae) from limestone hills in Perlis, Peninsular Malaysia, is described and illustrated. Diagnostic characters, description, detailed illustrations, geographical distribution, regional provisional conservation status assessment (Endangered) and ecological observations of the new taxon, as well as an updated key to Microchirita species in Peninsular Malaysia, are provided.

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Research Article Fri, 1 Mar 2019 12:23:08 +0200